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Oleksandr Tkach graduated in Microelectronics and Semiconductor Devices by the National Technical University of Ukraine “Kyiv Polytechnic Institute” in 1999, investigating nanocrystalline silicon for optoelectronic applications. In 2005 he received PhD degree in Materials Science & Engineering from the University of Aveiro, Portugal, studying strontium titanate-based ceramics for tunable device applications under a personal PhD grant by Portuguese Foundation for Science and Technology (FCT). Completion of PhD was followed by an award of Marie Curie Experienced Research position at the University of Barcelona. However, being Ukrainian but not supported in obtaining a Spanish work visa, Dr. Tkach had to return to Aveiro for 1.5 years as a post-doctoral fellow in multiferroic research, participating in EU FP6 STREP project MULTICERAL and European Network of Excellence FAME and contributing to 2 invited talks. In 2007 Dr. Tkach won a personal post-doctoral grant by FCT to work on alkali tantalates and other perovskite ceramics and thin films at the University of Porto, contributing to 2 FCT R&D projects and to awarded poster done within bilateral Portugal/Germany project. In 2012, he received a researcher contract at the Johannes Gutenberg University of Mainz, Germany, within EU FP7 project IFOX and ERC project MASPIC, investigating artificial multiferroic heterostructures and contributing to the photoemission-electron-microscopy synchrotron beam-times. --- In 2014 Dr. Tkach was promoted to FCT Assistant Researcher position at the University of Aveiro, CICECO, coordinating FCT Independent Researcher project in 2014-2019. Within this project, 2 post-doc fellows were hired with Dr. Tkach as a solely supervisor for them as well as for 1 Master student. There are also 8 Master and 1 post-doc co-supervisions by Dr. Tkach. Besides being the project PI, Dr. Tkach participated in COST action TO-BE, starting to publish book chapters, contribute to the organization of scientific events, and to give invited talks. Since 2015, he gave 14 and contributed to more 6 invited or keynote talks and 1 awarded poster; was an organization or scientific committee member of 6 events; edited a book published by Nova Science Publishers; joined Editorial boards of 5 scientific journals, also reviewing manuscripts for >50 journals. Dr. Tkach participated in more 3 FCT R&D projects BioMEMs, FLEXIDEVICE and PIEZOFLEX, 2 projects with industry SGH and AM4SP, and 4 COST actions since 2018. Having not funded but highly evaluated by FCT project proposal in 2022, Dr. Tkach is also awarded by internal CICECO project as a PI, renewing at the same 2022 the FCT Assistant Researcher position and winning FCT Principal Researcher position to be started in 2024 at the University of Aveiro. In overall, Dr. Tkach participated in 3 European, 8 Portuguese FCT and 2 projects with industry as well as 2 bilateral projects with aggregate amount over 48 M€. --- Dr. Tkach publication profile contains 1 edited book, 8 book chapters and 111 articles. Of his 44 publications in the areal top quartile JCR SCI journals, 22 articles are published in the in the top 5 journals of their areas. Five articles by Dr. Tkach were highlighted as the feature or editor choice or hot papers, and two were selected for reproduction in book “100 Years of Ferroelectricity 1921 – 2021” by World Scientific. Dr. Tkach is first author, lead writer, and principal contributor on 49/4 and corresponding author on 36/4 papers/chapters.
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Identification

Personal identification

Full name
Oleksandr Tkach

Citation names

  • Tkach, Alexander
  • Alexander Tkach

Author identifiers

Ciência ID
FF15-D360-6EAE
ORCID iD
0000-0002-0318-9262
Google Scholar ID
I5t9g6EAAAAJ
Researcher Id
Q-9369-2016
Scopus Author Id
7006368460

Websites

Knowledge fields

  • Engineering and Technology - Materials Engineering
  • Engineering and Technology - Materials Engineering - Ceramics
  • Engineering and Technology - Materials Engineering - Composites
  • Exact Sciences - Physical Sciences - Condensed Matter Physics
  • Engineering and Technology - Materials Engineering - Coating and Films
  • Engineering and Technology - Nano-technology - Nano-materials

Languages

Language Speaking Reading Writing Listening Peer-review
Ukrainian (Mother tongue)
English Advanced (C1) Advanced (C1) Advanced (C1) Advanced (C1)
Portuguese Upper intermediate (B2) Advanced (C1) Upper intermediate (B2) Advanced (C1)
German Beginner (A1) Beginner (A1) Beginner (A1) Beginner (A1)
Education
Degree Classification
2005/09/14
Concluded
 Ciência e Engenharia de Materiais (Doutoramento)
Universidade de Aveiro, Portugal
"Strontium titanate based ceramics for tunable device applications" (THESIS/DISSERTATION)
 approved
1999
Concluded
 Microelectronics and Semiconductor Devices (Mestrado)
National Technical University of Ukraine “Kiev Polytechnic Institute”, Ukraine
"Nanocristalline silicon based structures photosensitive in visible range" (THESIS/DISSERTATION)
 excellent
1997
Concluded
 Electronics (Licenciatura)
National Technical University of Ukraine “Kiev Polytechnic Institute”, Ukraine
"n/a" (THESIS/DISSERTATION)
 excellent
Affiliation

Science

Category
Host institution 		Employer
2022/05/15 - Current Auxiliary Researcher (Research) Universidade de Aveiro CICECO, Portugal
2019/09/13 - 2022/03/13 Contracted Researcher (Research) Universidade de Aveiro CICECO, Portugal
2019/02/13 - 2019/09/12 Postdoc (Research) Universidade de Aveiro CICECO, Portugal
2014/02/01 - 2019/01/31 Auxiliary Researcher (Research) Universidade de Aveiro CICECO, Portugal
2012/12/01 - 2014/01/31 Contracted Researcher (Research) Johannes Gutenberg Universität Mainz, Germany
2007/06/01 - 2012/02/15 Postdoc (Research) Universidade do Porto Instituto de Física dos Materiais-Instituto de Nanociência e Nanotecnologia, Portugal
2005/12/01 - 2007/05/31 Postdoc (Research) Universidade de Aveiro CICECO, Portugal

Others

Category
Host institution 		Employer
2000/10/01 - 2005/09/14 PhD student Universidade de Aveiro CICECO, Portugal
1999/11/01 - 2000/09/30 PhD student Institute of Semiconductor Physics, National Academy of Science of Ukraine, Ukraine
1999/07/01 - 1999/10/31 Engineer Institute of Semiconductor Physics, National Academy of Science of Ukraine, Ukraine
1993/09/01 - 1999/06/30 Student National Technical University of Ukraine “Kiev Polytechnic Institute”, Ukraine
Projects

Grant

Designation Funders
2016/03/01 - 2017/12/31 Ni doped carbon-based materials for sensor application
SFRH/BPD/77704/2011
Supervisor
Universidade de Aveiro, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2007/06/01 - 2012/02/14 POTASSIUM LITHIUM TANTALATE THIN FILMS AND NANO-LAYERED SUPERLATTICES FOR FUNCTIONAL ELECTRONIC APPLICATIONS
SFRH/BPD/34607/2007
Post-doc Fellow
Universidade do Porto Instituto de Física dos Materiais-Instituto de Nanociência e Nanotecnologia, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2005/09/30 - 2005/10/01 Shape Memory Alloys
MRTN-CT-2004-505226
Researcher
Universitat de Barcelona Departament de d'Estructura i Constituents de la Materia, Spain
 European Commission
Cancelled
2002/01/01 - 2005/09/14 SrTiO3-based ceramics for tunable capacitor application
SFRH/BD/6624/2001
PhD Student Fellow
Universidade de Aveiro CICECO, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
1999/11/15 - 2000/09/30 Nanocrystalline silicon based optoelectronic structures
FTT 01/1999
PhD Student Fellow
Institut fiziki napivprovidnikiv imeni V E Laskar'ova Nacional'na akademia nauk Ukraini, Ukraine
 Nacional'na akademia nauk Ukraini
Cancelled

Contract

Designation Funders
2023/01/01 - 2024/12/31 Sustainable Multiscale Engineering of High-Performance Oxide Composites for Energy Harvesting
UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020
Principal investigator
Universidade de Aveiro CICECO, Portugal
 Universidade de Aveiro CICECO
Ongoing
2020/01/01 - 2024/12/31 CICECO - Aveiro institute of materials
UIDB/50011/2020
Researcher
Universidade de Aveiro CICECO, Portugal
 Fundação para a Ciência e a Tecnologia

European Regional Development Fund
Ongoing
2020/01/01 - 2024/12/31 CICECO - Aveiro institute of materials
UIDP/50011/2020
Researcher
Universidade de Aveiro CICECO, Portugal
 Fundação para a Ciência e a Tecnologia

European Regional Development Fund
Ongoing
2020/12/01 - 2023/06/30 AM4SP - Additive Manufacturing for Smart Plastics
POCI-01-0247-FEDER-070521
Researcher
Universidade de Aveiro CICECO, Portugal
 European Regional Development Fund

Fundação para a Ciência e a Tecnologia
Concluded
2018/06/01 - 2022/05/31 BioMEMs - Advanced BioMEMs for tissue engineering: applications in hard tissues
POCI-01-0145-FEDER-032095
Researcher
Universidade de Aveiro CICECO, Portugal
 Fundação para a Ciência e a Tecnologia

European Regional Development Fund
Concluded
2019/09/13 - 2022/03/13 FLEXIDEVICE - Development of sustainable materials for application in flexible electronic and energy harvesting devices
POCI-01-0145-FEDER-029671
Researcher
Universidade de Aveiro CICECO, Portugal
 Fundação para a Ciência e a Tecnologia

European Regional Development Fund
Concluded
2020/11/01 - 2022/01/31 PIEZOFLEX - High-performance piezoelectric flexible materials enabled by hierarchically porous graphite for application as mechanical energy harvesters and sensors
UTA-EXPL/NPN/0015/2019
Researcher
Universidade de Aveiro CICECO, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2019/01/01 - 2019/12/31 CICECO - Aveiro institute of materials
UID/CTM/50011/2019
Researcher
Fundação para a Ciência e a Tecnologia

European Regional Development Fund
Concluded
2019/02/13 - 2019/09/12 SGH - SMART GREEN HOMES
POCI-01-0247-FEDER-007678
Post-doc Fellow
Universidade de Aveiro CICECO, Portugal
 Fundação para a Ciência e a Tecnologia

European Regional Development Fund
Ongoing
2014/10/01 - 2019/01/31 Multifunctional all-oxide nanostructures for electronic applications
Provided by PTCRIS: 147571
IF/00602/2013
Principal investigator
Universidade de Aveiro CICECO, Portugal
 Fundação para a Ciência e a Tecnologia, I.P.
Concluded
2015/01/01 - 2018/12/31 CICECO - Aveiro institute of materials
UID/CTM/50011/2013
POCI-01-0145- FEDER-007679
Researcher
Universidade de Aveiro CICECO, Portugal
 Fundação para a Ciência e a Tecnologia

European Regional Development Fund
Concluded
2014/02/01 - 2014/12/31 Centre for research in ceramics and composite materials - CICECO
CICECO-FCOMP- 01-0124-FEDER-037271
PEst-C/CTM/LA0011/2013
Researcher
Universidade de Aveiro CICECO, Portugal
 European Regional Development Fund

Fundação para a Ciência e a Tecnologia
Concluded
2013/12/01 - 2014/01/31 MASPIC - Spin currents in magnetic nanostructures
ERC-2007-StG-208162
Researcher
Johannes Gutenberg-Universität Mainz Institut für Physik, Germany
 European Commission
Concluded
2012/12/01 - 2013/11/30 IFOX - Interfacing Oxides
NMP3-LA-2010-246102
Researcher
Johannes Gutenberg-Universität Mainz Institut für Physik, Germany
 European Commission
Concluded
2010/06 - 2012/11 Multiferroics and magnetoelectrics for spintronics: barriers and interfaces
Provided by PTCRIS: 99415
Post-doc Fellow
Universidade do Porto Instituto de Física dos Materiais-Instituto de Nanociência e Nanotecnologia, Portugal
 Fundação para a Ciência e a Tecnologia, I.P.
Concluded
2008/02 - 2012/02 Statics and dynamics of high polarizable ultra-thin films and nano-layered superlattices
Provided by PTCRIS: 64805
Post-doc Fellow
Universidade do Porto Instituto de Física dos Materiais-Instituto de Nanociência e Nanotecnologia, Portugal
 Fundação para a Ciência e a Tecnologia, I.P.
Concluded
2008/01/01 - 2008/12/31 Investigation of magnetoelectric coupling in the glassy multiferroic (Sr,Mn)TiO3
GRICES/DAAD 2008/2009
Post-doc Fellow
Universidade de Aveiro, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2006/10/01 - 2008/09/30 European Network of Excellence FAME - Functionalised advanced materials engineering of hybrids and ceramics
FP6-2002-NMP-1-500159
Post-doc Fellow
Universidade de Aveiro, Portugal
 European Commission
Concluded
2006/02/01 - 2008/01/15 Dielectric properties and lattices dynamics of granular materials
POCTI/CTM/45284/2002
Post-doc Fellow
Universidade de Aveiro CICECO, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2006/12/01 - 2007/05/31 MULTICERAL - Multifunctional ceramic layers with high electromagnetoelastic coupling in complex geometries
NMP3-CT-2004-32616
Post-doc Fellow
Universidade de Aveiro CICECO, Portugal
 European Commission
Concluded
2007/05/21 - 2007/05/28 Study of size effects in nano-grained (Ba,Sr)TiO3 ceramics
PC2903
Invited Scientist Fellow
Grantová agentura Ceské republiky
Concluded
2001/04/01 - 2007/03/31 European Thematic Network POLECER - Polar Electroceramics
FP5-G5RT-CT-2001-05024
PhD Student Fellow
Universidade de Aveiro, Portugal
 European Commission
Concluded
2000/10/01 - 2004/04/01 Ceramics and films of incipients ferroelectrics for tunable capacitor applications
POCI/35542/PT
PhD Student Fellow
Universidade de Aveiro, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded
2001/03/15 - 2002/03/14 Dielectric characterization of incipient ferroelectrics for tunable capacitor applications
ICCTI/ASCR 2002/2003
PhD Student Fellow
Universidade de Aveiro, Portugal
 Fundação para a Ciência e a Tecnologia
Concluded

Other

Designation Funders
2024/03/22 - 2027/10/02 COST Action CA22143 - European Materials Informatics Network (EuMINe)
COST Action CA22143
Researcher
European Cooperation in Science and Technology, Belgium
Ongoing
2023/10/03 - 2027/10/02 COST Action CA22123 - European Materials Acceleration Center for Energy (EU-MACE)
COST Action CA22123
Researcher
European Cooperation in Science and Technology, Belgium
Ongoing
2024/02/16 - 2027/09/25 COST Action CA22154 - Data-driven Applications towards the Engineering of Functional Materials: an Open Network (DAEMON)
COST Action CA22154
Researcher
European Cooperation in Science and Technology, Belgium
Ongoing
2022/03 - 2025/10 COST action CA20126 NETPORE - Network on porous semiconductors and oxides
COST Action CA20126
Researcher
European Cooperation in Science and Technology, Belgium
Ongoing
2014/04/15 - 2018/04/14 COST action MP1308 TO-BE - Toward oxide based electronics
COST Action MP1308
Researcher
European Cooperation in Science and Technology, Belgium
 European Cooperation in Science and Technology
Concluded
2013/03/22 - 2013/03/30 Magneto-elastic effect in nanostructured Fe3O4 on PMN-PT measured by dynamical XMCD-PEEM imaging
20130097
Researcher
Paul Scherrer Institut, Switzerland
 Paul Scherrer Institut
Concluded
2013/01/28 - 2013/02/03 Efficient current-induced domain wall motion in advanced half-metallic nanostructures
2012_2_120385
Researcher
Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Germany
 Helmholtz-Zentrum Berlin für Materialien und Energie GmbH
Concluded
2012/12/07 - 2012/12/14 Magnetoelastic coupling in ferromagnetic nanostructures investigated by PEEM
20121042
Researcher
Paul Scherrer Institut, Switzerland
 Paul Scherrer Institut
Concluded
2000/10/01 - 2005/07/06 COST action 525 Advanced Electroceramics: Grain Boundary Engineering
COST Action 525
PhD Student Fellow
European Cooperation in Science and Technology, Belgium
 European Cooperation in Science and Technology
Concluded
Outputs

Publications

Book chapter
  1. Okhay, Olena; Tkach, Alexander. "Metal Oxide Based Thermoelectric Materials". In Optical Properties of Metal Oxide Nanostructures, 399-430. Springer Nature Singapore, 2023.
    Published • 10.1007/978-981-99-5640-1_13
  2. Tkach, Alexander. "Antiferrodistortive phase transition in doped strontium titanate ceramics: the role of the perovskite lattice vacancies". In Perovskite Ceramics, edited by J. Clabel; V. Rivera, 77-98. Elsevier, 2022.
    Published
  3. Tkach, Alexander; Vilarinho, Paula. "Nonstoichiometry Role on the Properties of Quantum-Paraelectric Ceramics". In Structure Processing Properties Relationships in Stoichiometric and Nonstoichiometric Oxides, edited by S. Tanasescu. London, United Kingdom: IntechOpen, 2020.
    Published • 10.5772/intechopen.89499
  4. Tkach, Alexander; Okhay, Olena; Santos, André; Zlotnik, Sebastian; Serrazina, Ricardo; Vilarinho, Paula; Costa, M. Elisabete. "Strain Effect on the Properties of Polar Dielectric Thin Films". In Advances in Thin Films, Nanostructured Materials, and Coatings, edited by A. Pogrebnjak; V. Novosad, 331-342. Springer Singapore, 2019.
    Published • 10.1007/978-981-13-6133-3_32
  5. Tkach, Alexander; Resende, João; Diaz-Chao, Pablo; Guilmeau, Emmanuel; Costa, Maria Elisabete; P. M. Vilarinho. "Enhancement of thermoelectric performance in SrTiO3-based ceramics by processing conditions". In Strontium Titanate: Synthesis, Properties and Uses, edited by Alexander Tkach; P. M. Vilarinho, 297-322. New York, United States: Nova Science Publishers, 2019.
    Published
  6. Okhay, Olena; Tkach, Alexander; Vilarinho, Paula. "Effect of bismuth doping on the properties of strontium titanate thin films". In Strontium Titanate: Synthesis, Properties and Uses, edited by Alexander Tkach; P. M. Vilarinho, 209-258. New York, United States: Nova Science Publishers, 2019.
    Published
  7. Amaral, Luís; Tkach, Alexander; Vilarinho, Paula; Senos, Ana M. R.. "Sr/Ti ratio in strontium titanate ceramics: designing the microstructure, envisaging the properties". In Strontium Titanate: Synthesis, Properties and Uses, edited by Alexander Tkach; P. M. Vilarinho, 71-100. New York, United States: Nova Science Publishers, 2019.
    Published
  8. Zlotnik, Sebastian; Tkach, Alexander; Vilarinho, Paula. "Functional Tantalum-based Oxides: From the Structure to the Applications". In Advanced Ceramic Materials, edited by A. Tiwari; R. A. Gerhardt ; M. Szutkowska, 337-383. United States: John Wiley & Sons, Inc., 2016.
    Published • 10.1002/9781119242598.ch9
Conference abstract
  1. Sá, Fernando; Silva, Mariana; Ivanov, Maxim; Tkach, Alexander; Vilarinho, Paula M.; Ferreira, Paula. "Hydrothermal Synthesis of Barium Titanate Nanoparticles: The Effect of the Heating System". Paper presented in Materiais 2022 - Mater. Proc., Marinha Grande, 2022.
    Published • 10.3390/materproc2022008141
  2. Bdikin, Igor; Alexander Tkach; Cláudia Nunes; P. M. Vilarinho; Paula Celeste da Silva Ferreira; Guzman Sierra, Dayana. "Flexible bionanocomposites of chitosan and barium titanate with piezoelectricity for biomedical sensor applications". Paper presented in Design and Function of Stimuli Responsive Nanocomposites Symposium, Dublin (online), 2021.
    Accepted
Conference paper
  1. Bouca, Patricia; Pinho, Rui; Wlodarkiewicz, Anna; Tkach, Alexander; Matos, Joao Nuno; Vilarinho, Paula M.; de Carvalho, Nuno Borges. "RF Phase Shifters Design Based on Barium Strontium Titanate Thick and Thin Films". Paper presented in 2022 IEEE MTT-S International Conference on Microwave Acoustics and Mechanics (IC-MAM), Munich, 2022.
    Published • 10.1109/ic-mam55200.2022.9855378
  2. Bouca, Patricia; Figueiredo, Ricardo; Wlodarkiewicz, Anna; Tkach, Alexander; Matos, Joao Nuno; Vilarinho, Paula M.; De Carvalho, Nuno Borges. "Barium Strontium Titanate Thick Films for Tunable Software-Defined Radio Front-Ends". Paper presented in 2021 IEEE MTT-S International Microwave Symposium (IMS), Atlanta (Online), 2021.
    Published • 10.1109/ims19712.2021.9574935
  3. Jin, Zuanming; Tkach, Alexander; Casper, Frederick; Spetter, Victor; Grimm, Hubert; Thomas, Andy; Kampfrath, Tobias; et al. "Resolving the Fundamentals of Magnetotransport in Metals with Ultrafast Terahertz Spectroscopy". Paper presented in International Conference on Ultrafast Phenomena UP 2016, Santa Fe, New Mexico, 2016.
    Published • 10.1364/up.2016.utu3a.4
  4. Jin, Zuanming; Tkach, Alexander; Casper, Frederick; Spetter, Victor; Grimm, Hubert; Kläui, Mathias; Bonn, Mischa; Turchinovich, Dmitry. "Probing Giant Magnetoresistance with THz Spectroscopy". Paper presented in Conference on Lasers and Electro-Optics CLEO 2014, San Jose, California, 2014.
    Published • 10.1364/cleo_qels.2014.fm4b.4
  5. Tkach, A.; Vilarinho, P.M.; Almeida, A.. "Field effect on the dielectric properties of Sr1-1.5xYxTiO3 ceramics". Paper presented in IMAPS/ACerS 4th International Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies 2008 (CICMT 2008), Munich, 2008.
    Published
Conference poster
  1. O.Okhay; Otero-Irurueta, Gonzalo; YANG, TAO; Alexander Tkach. "Reduced graphene oxide for energy storage". Paper presented in International Conference-Workshop on Functional Nanostructured Materials 4 (FuNaM-4), September 26th-29th, 2023, Krakow, Poland, 2023.
  2. Ribeiro, Camila; Nathan Kerkad; Tkach, Alexander; Soreto, Silvia; Marinheiro, J.; Costa, M.E.; Senos, Ana M. R.; Vilarinho, P. M.. "Exploring Flash sintering as a processing technique of porcelain-based materials". Paper presented in XXI Portuguese Materials Society Congress, XII International Symposium on Materials - Materiais 2023, 2023.
  3. Loureiro, I; Pinho, R; Tkach, Alexander; Costa, M.E.; Vilarinho, P.M.. "Processing of flexible PDMS/KNN/G piezocomposites for energy harvesting enhancement". Paper presented in XXI Portuguese Materials Society Congress, XII International Symposium on Materials - Materiais 2023, 2023.
  4. Martinho Lima; Tatiana Miranda; Ana Alves Silva; Alexander Tkach; Pedro Fonseca; Paula M. Vilarinho. "Capacitive Tactile Sensors by Additive Manufacturing: An Electrode Material Comparison Study". Paper presented in 3-day International Conference on Materials Science (3d-ICOMAS), 2022.
  5. Sá, Fernando; Mariana R. F. Silva; Maxim Ivanov; Alexander Tkach; Paula M. Vilarinho; Paula Ferreira. "The impact of the hydrothermal synthesis procedure on the production of barium titanate nanoparticles". Paper presented in Jornadas CICECO2022, 2022.
  6. Ribeiro, Camila; Kerkad, Nathan; Tkach, Alexander; Soreto, Silvia; Marinheiro, J.; Costa, M.E.; Senos, Ana M. R.; Vilarinho, Paula M.. "FLASH sintering applied to porcelain production: Development of Processing Maps". Paper presented in ECerS XVII, ICC9 and Electroceramics XVIII, 2022.
  7. Guzman Sierra, Dayana; Cláudia Nunes; P. M. Vilarinho; Paula Celeste da Silva Ferreira; Alexander Tkach; Tuukkanen, Sampo. "Strcutural and mechanical properties effect in the electromechanical response of free-standing chitosan films". Paper presented in Jornadas do CICECO 2021, 2021.
  8. Okhay, Olena (951B-95CB-0118); Tkach, Alexander; Tuukkanen, Sampo. "Reduced graphene oxide based symmetric supercapacitors fabricated on copper and carbon tapes". Paper presented in 17th International conference on Advanced Nanomaterials ANM 2021, 2021.
  9. A. Tkach; J. Resende; P. Diaz Chao; E. Guilmeau; K.V. Saravanan; M.E. Costa; P.M. Vilarinho. "Enhancement of thermoelectric performance in Nb-doped SrTiO3 ceramics by processing conditions". Paper presented in Jornadas CICECO 2019, 2019.
  10. R. Serrazina; N. Ferreira; L. Figueiredo; A. Tkach; D. Dias; A. Serrão; P. São Marcos; P.M. Vilarinho; A.M.R. Senos. "Exploitation of Industrial Application of FLASH to Sinter Ceramics". Paper presented in Electric Field Enhanced Processing of Advanced Materials II - ECI Meeting 2019, Tomar, Portugal, 2019.
  11. A. Tkach; A. Santos; S. Zlotnik; R. Serrazina; O. Okhay; M.E. Costa; P.M. Vilarinho. "Structure, microstructure and electrical response of polycrystalline KNN thin films on platinized sapphire substrates". Paper presented in 10th International Meeting `Electroceramics for End Users X - PIEZO 2019‘, Špindleruv Mlýn, Czech Republic, 2019.
  12. A. Tkach; O. Okhay; D. Nuzhnyy; J. Petzelt; P.M. Vilarinho. "Polar phonon behaviour in polycrystalline SrTiO3 thin films: the role of the substrate". Paper presented in 6th International Conference "Nanotechnologies and Nanomaterials" NANO-2018, Kyiv, Ukraine, 2018.
  13. O. Okhay; S. Zlotnik; W. Xie; K. Orlinski; M.J. Hortiguela Gallo; G. Otero-Irurueta; D.A. Pawlak; A. Weidenkaff; A. Tkach. "Thermoelectric performance of Nb-doped SrTiO3 enhanced by reduced graphene oxide and Sr deficiency cooperation". Paper presented in 21st International Conference on Solid Compounds of Transition Elements SCTE-2018, Vienna, Austria, 2018.
  14. A. Tkach; A. Kehlberger; F. Büttner; G. Jakob; S. Eisebitt; M. Kläui. "Quantitative analysis of magnetization reversal in Ni thin films on unpoled and poled (011) [PbMg1/3Nb2/3O3]0.68-[PbTiO3]0.32 piezoelectric substrates". Paper presented in International Conference on Strongly Correlated Electron Systems SCES 2017, Prague, Czech Republic, 2017.
  15. O. Okhay; A.C. Bastos; E. Titus; A.M. Bastos Pereira; A. Tkach. "Reduced Graphene Oxide-based Electrodes for the Energy Storage Devices". Paper presented in 9th International conference on Advanced Nanomaterials ANM 2017, Aveiro, Portugal, 2017.
  16. O. Okhay; W. Xie; A. Weidenkaff; A. Tkach. "Modification of thermoelectric properties of Nb doped SrTiO3 ceramics by reduced graphene oxide". Paper presented in XVIII Portuguese Materials Society Congress, VIII International Symposium on Materials Materiais 2017, Aveiro, Portugal, 2017.
  17. O. Okhay; G. Gonçalves; C. Dias; J. Ventura; E.M.F. Viera; L.M.V. Gonçalves; A. Tkach. "Manipulation of the power factor of reduced graphene oxide freestanding paper by temperature and addition of carbon nanotubes". Paper presented in XVIII Portuguese Materials Society Congress, VIII International Symposium on Materials Materiais 2017, Aveiro, Portugal, 2017.
  18. O. Okhay; C. Dias; J. Ventura; W. Xie; A. Weidenkaff; E. Titus; A. Tkach. "New Composite of Reduced Graphene Oxide with Potassium Chloride for Thermoelectric Applications". Paper presented in 11th NANOSMAT-2016, Aveiro, Portugal, 2016.
  19. A. Tkach; P.M. Vilarinho; J.S. Amaral; V.S. Amaral. "Dielectric Spectroscopy and Magnetometry Investigation of Gd- and Dy-doped Strontium Titanate Ceramics". Paper presented in Joint ISAF/ECAPD/PFM Meeting 2016, Darmstadt, Germany, 2016.
  20. O. Okhay; G. Gonçalves; C. Dias; J. Ventura; E. Titus; A. Tkach. "Manipulation of Electrical Conductivity of Graphene Oxide Films by Addition of Carbon Nanotubes and Thermal Treatment". Paper presented in 7th International Conference on Advanced Nanomaterials ANM 2016, Aveiro, Portugal, 2016.
  21. A. Tkach; P.M. Vilarinho; A. Almeida. "Giant Dielectric Permittivity and High Tunability in Y-doped Strontium Titanate Ceramics and Their Relation to Sintering Atmosphere". Paper presented in Jornadas CICECO 2016, Aveiro, Portugal, 2016.
  22. O. Okhay; G. Gonçalves; C. Dias; J. Ventura; M.F. Ribeiro da Silva; L.M. Valente Gonçalves; E. Titus; A. Tkach. "Thin Film versus Paper-like Reduced Graphene Oxide: Comparative study of Structural, Electrical, and Thermoelectrical Properties". Paper presented in Jornadas CICECO 2016, Aveiro, Portugal, 2016.
  23. A. Tkach; A. Kehlberger; F. Büttner; G. Jakob; S. Eisebitt; M. Kläui. "Electric field modification of magnetotransport in Ni thin films on (011) PMN-PT piezosubstrates". Paper presented in 13th European Meeting on Ferroelectricity EMF 2015, Porto, Portugal, 2015.
  24. O. Okhay; A. Tkach; C. Dias; J. Ventura; M.F.R. Silva; L.M.V. Gonçalves; E. Titus. "Conductive Paper-like Reduced Graphene Oxide Obtained by a Simple Process". Paper presented in 6th International Conference on Advanced Nanomaterials ANM 2015, Aveiro, Portugal, 2015.
  25. A. Tkach; P.M. Vilarinho. "Aliovalently doped SrTiO3: Structure, Microstructure and Dielectric Spectroscopy Studies". Paper presented in Jornadas CICECO 2015, Aveiro, Portugal, 2015.
  26. A. Tkach; M. Baghaie Yazdi; M. Foerster; F. Büttner; M. Vafaee; M. Fries; M. Kläui. "Magnetoelectric properties of epitaxial Fe3O4 thin films on (011) PMN-PT piezosubstrates". Paper presented in MP1308 COST Action TO-BE “Towards Oxide-Based Electronics” 2015 Spring meeting, Aveiro, Portugal, 2015.
  27. A. Tkach; P.M. Vilarinho. "Doped SrTiO3: Structure, Microstructure and Dielectric Spectroscopy Studies". Paper presented in MP1308 COST Action TO-BE “Towards Oxide-Based Electronics” 2014 Fall meeting, Rome, Italy, 2014.
  28. O. Okhay; L.M. Guerra; J. Ventura; A. Tkach; M. Kläui; R. Krishna; E. Titus; J. Gracio. "Electrical and magnetic properties of graphene films with Ni nanoparticles". Paper presented in 5th International Conference on Advanced Nanomaterials ANM 2014, Aveiro, Portugal, 2014.
  29. S. Finizio; M. Foerster; M. Buzzi; T. Miyawaki; C.A.F. Vaz; A. Tkach; J.L. Hockel; G.P. Carmane; M. Kläui. "Spin structure manipulation in Nickel nanostructures by magneto-elastic coupling to piezoelectric PMN-PT substrates". Paper presented in Newspin3 Conference, Mainz, Germany, 2013.
  30. S. Finizio; M. Foerster; M. Buzzi; T. Miyawaki; C.A.F. Vaz; A. Tkach; J.L. Hockel; G.P. Carman; M. Kläui. "Spin structure manipulation by magneto-elastic coupling in Ni nanostructures on PMN-PT substrates". Paper presented in DPG Spring Meeting, Regensburg, Germany, 2013.
  31. S. Zlotnik; A. Tkach; A. Almeida; J. Agostinho Moreira; P.M. Vilarinho. "A comparative Raman study of lithium doped potassium tantalate single crystals and ceramics". Paper presented in Joint ISAF/ECAPD/PFM Meeting 2012, Aveiro, Portugal, 2012.
  32. D.A. Mota; Y. Romaguera-Barcelay; A. Tkach; J. Perez de la Cruz; J. Agostinho Moreira; A. Almeida. "Characterization of MTaO3 (M=Li, Na, K) thin films, processed by radio frequency magnetron sputtering". Paper presented in Frontiers in Electronic Materials: Correlation Effects and Memristive Phenomena, Eurogress Aachen, Aachen, Germany, 2012.
  33. A. Tkach; P.M. Vilarinho; A. Almeida. "Microscopy and the solid solubility limit in K1-xMnxTaO3 ceramics". Paper presented in Microscopy at the Frontiers of Science, Aveiro, Portugal, 2011.
  34. A. Tkach; A. Almeida; J. Agostinho Moreira; A. Espinha; M.R. Chaves; J. Perez. "Lithium-induced dielectric relaxations in potassium tantalate ceramics". Paper presented in 12th European Meeting on Ferroelectricity EMF 2011, Bordeaux, France, 2011.
  35. A. Tkach; T.M. Correia; A. Almeida; J. Agostinho Moreira; M.R. Chaves; O. Okhay; P.M. Vilarinho; I. Gregora; J. Petzelt. "Lattice dynamics of SrTiO3 with heterovalent dopants". Paper presented in 23rd General Conference of the Condensed Matter Division of the European Physical Society, Warsaw, Poland, 2010.
  36. A. Tkach; A. Espinha; A. Almeida; J. Agostinho Moreira; M.R. Chaves; P.M. Vilarinho. "Polar dielectric relaxations and lattice dynamics in K1-xLixTaO3 ceramics". Paper presented in 23rd General Conference of the Condensed Matter Division of the European Physical Society, Warsaw, Poland, 2010.
  37. A. Tkach; A. Espinha; A. Almeida; J. Agostinho Moreira; M.R. Chaves; P.M. Vilarinho. "Relaxational and lattice dynamics of potassium tantalate based ceramics". Paper presented in 32nd International Symposium on Dynamical Properties of Solids DyProSo XXXII, Antwerp, Belgium, 2009.
  38. P.M. Vilarinho; A. Tkach; A. Almeida; S. Bedanta; P. Borisov; V.V. Shvartsman; W. Kleemann. "Dielectric and Magnetic Properties of Mn-doped Potassium Tantalate Ceramics". Paper presented in 2008 MRS Fall Meeting, Boston, USA, 2008.
  39. P.M. Vilarinho; O. Okhay; A. Tkach; S. Bedanta; V.V. Shvartsman; P. Borisov; W. Kleemann. "Dielectric and Magnetic Properties of Polycrystalline (Sr,Mn)TiO3 Thin Films". Paper presented in 2008 MRS Fall Meeting, Boston, USA, 2008.
  40. A. Almeida; J. Agostinho Moreira; A. Tkach; T.M. Correia; P.M. Vilarinho; D.A. Kiselev; A. Kholkin. "Phonon dynamics in Strontium Titanate Ceramics doped with Yttrium". Paper presented in 22nd General Conference of the Condensed Matter Division of the European Physical Society, Rome, Italy, 2008.
  41. O. Okhay; A. Tkach; P.M. Vilarinho; S. Bedanta; V.V. Shvartsman; P. Borisov; W. Kleemann. "Electric and Magnetic Properties of Incipient Ferroelectric Films Doped with Manganese". Paper presented in E-MRS 2008 Spring Meeting, Strasbourg, France, 2008.
  42. A. Tkach; P.M. Vilarinho; A. Almeida. "Field Effect on the Dielectric Properties of Sr1-1.5xYxTiO3 Ceramics". Paper presented in IMAPS/ACerS 4th International Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies CICMT 2008, Munich, Germany, 2008.
  43. O. Okhay; A. Tkach; A. Wu; P.M. Vilarinho. "Stress influence on dielectric properties of polycrystalline SrTiO3 films". Paper presented in 2007 MRS Fall Meeting, Boston, USA, 2007.
  44. T.M. Correia; D.A. Kiselev; A. Almeida; J. Agostinho Moreira; M.R. Chaves; P.M. Vilarinho; A.L. Kholkin; A. Tkach. "Search for polar microregions in doped Strontium Titanate ceramics". Paper presented in 31st International Symposium on the Dynamic Properties of Solids DyProSo XXXI, Porto, Portugal, 2007.
  45. J. Agostinho Moreira; T.M. Correia; A. Almeida; M.R. Chaves; M.L. Santos; P.M. Vilarinho; A.L. Kholkin; A. Tkach. "Inelastic light scattering study of doped SrTiO3 ceramics". Paper presented in 31st International Symposium on the Dynamic Properties of Solids DyProSo XXXI, Porto, Portugal, 2007.
  46. T.M. Correia; A. Almeida; J. Agostinho Moreira; M.R. Chaves; M.L. Santos; P.M. Vilarinho; A.L. Kholkin; A. Tkach. "Studying polar relaxations in doped SrTiO3-based oxides". Paper presented in 31st International Symposium on the Dynamic Properties of Solids DyProSo XXXI, Porto, Portugal, 2007.
  47. T. Ostapchuk; J. Petzelt; P. Kuzel; S. Veljko; A. Tkach; P.M. Vilarinho; A. Sotnikov; et al. "Infrared and THz soft-mode spectroscopy of (Ba,Sr)TiO3 ceramics". Paper presented in 11th European Meeting on Ferroelectricity EMF 2007, Bled, Slovenia, 2007.
  48. T.M. Correia; A. Almeida; J. Agostinho Moreira; M.R. Chaves; P.M. Vilarinho; A. Tkach; A.L. Kholkin. "TSDC and lattice dynamics in yttrium doped strontium titanate ceramics". Paper presented in Electroceramica 2007, Aveiro, Portugal, 2007.
  49. J. Agostinho Moreira; A. Almeida; M.R. Chaves; A. Tkach; P.M. Vilarinho; A.L. Kholkin; P.P. Alferes. "Phonon dynamics and field-induced thermally stimulated currents in Sr1-1.5xScxTiO3 ceramics". Paper presented in Electroceramica 2007, Aveiro, Portugal, 2007.
  50. A. Tkach; P.M. Vilarinho; A. Almeida. "Effect of sintering atmosphere on dielectric properties of yttrium doped strontium titanate ceramics". Paper presented in Electroceramica 2007, Aveiro, Portugal, 2007.
  51. P.M. Vilarinho; O. Okhay; A. Tkach; A. Wu. "Dielectric Properties of Sr1-1.5xBixTiO3 Sol Gel Thin Films". Paper presented in 10th International Conference and Exhibition of the European Ceramic Society ECerS 2007, Berlin, Germany, 2007.
  52. O. Okhay; A. Tkach; A. Wu; P.M. Vilarinho. "Low-temperature dielectric properties of Zn-doped SrTiO3 thin films prepared by sol-gel". Paper presented in International Symposium on Integrated Ferroelectrics ISIF 2007, Bordeaux, France, 2007.
  53. S. Bedanta; V.V. Shvartsman; W. Kleemann; A. Tkach; P.M. Vilarinho. "Magnetic properties of Mn-doped Strontium Titanate". Paper presented in 71st Annual Meeting of the Deutsche Physikalische Gesellschaft DPG 2007, Regensburg, Germany, 2007.
  54. A. Tkach; P.M. Vilarinho; A.L. Kholkin. "Nonlinear dc electric-field dependence of the dielectric constant and cluster polarization of Sr1-xMnxTiO3 ceramics". Paper presented in 8th European Conference on Applications of Polar Dielectrics ECAPD VIII, Metz, France, 2006.
  55. A. Tkach; P.M. Vilarinho; A.L. Kholkin. "Dielectric studies of Mn doped SrTiO3 ceramics: Influence of sintering atmosphere". Paper presented in Electroceramics X, Toledo, Spain, 2006.
  56. P.M. Vilarinho; A. Tkach; A.L. Kholkin; I.M. Reaney; J. Pokorny; J. Petzelt. "In situ structural phase transition analysis in doped strontium titanate". Paper presented in 2005 MRS Fall Meeting, Boston, USA, 2005.
  57. A. Tkach; O. Okhay; P.M. Vilarinho; A.L. Kholkin. "SrTiO3 ceramics for tunable components: Sr-site substitution with Cr3+ and Mn2+". Paper presented in POLECER International Workshop: Electro-active materials and sustainable growth, Abbey Les Vaux de Cernay, France, 2005.
  58. A. Tkach; P.M. Vilarinho; A. Kholkin; A.M. Slipenyuk; V.V. Laguta; M.D. Glinchuk; I.P. Bykov. "Study of Sr1-xMnxTiO3 and SrTi1-yMnyO3 ceramics by dielectric and ESR spectroscopy". Paper presented in XII Portuguese Materials Society Meeting, III International Materials Symposium Materiais 2005, Aveiro, Portugal, 2005.
  59. A. Tkach; A.B. Araújo; P.M. Vilarinho. "The Influence of dc Bias on the Dielectric Response of Sr1-xCaxTiO3 Ceramics". Paper presented in XII Portuguese Materials Society Meeting, III International Materials Symposium Materiais 2005, Aveiro, Portugal, 2005.
  60. A. Tkach; P.M. Vilarinho; A. Kholkin. "Relaxational dynamics in SrTiO3 - MnTiO3 ceramics". Paper presented in Junior Euromat 2004, Lausanne, Switzerland, 2004.
  61. A. Tkach; P.M. Vilarinho; A.M.R. Senos; A.L. Kholkin. "Effect of Nonstoichiometry on the Microstructure and Dielectric Properties of Strontium Titanate Ceramics". Paper presented in Electroceramics IX, Cherbourg, France, 2004.
  62. A. Tkach; P.M. Vilarinho; A. Kholkin. "Structural and Dielectric Properties of Mn-doped Strontium Titanate Ceramics". Paper presented in 10th European Meeting on Ferroelectricity EMF 2003, Cambridge, United Kingdom, 2003.
  63. A. Tkach; P.M. Vilarinho; A. Kholkin. "Structural and Dielectric Properties of Mg-doped Strontium Titanate Ceramics: Dependence on the Materials Processing". Paper presented in XI Portuguese Materials Society Meeting, II International Materials Symposium Materiais 2003, Campus da Caparica, Lisbon, Portugal, 2003.
  64. A. Tkach; P.M. Vilarinho; A. Kholkin. "Structural and electrical characterisation of Mn-doped strontium titanate ceramics". Paper presented in European Conference on Applications of Polar Dielectrics ECAPD VI, Aveiro, Portugal, 2002.
  65. A. Tkach; P.M. Vilarinho; A. Kholkin. "Doping effect on structural and electrical behaviour of strontium titanate ceramics". Paper presented in Electroceramics VIII, Roma, Italy, 2002.
  66. A. Tkach; P.M. Vilarinho; M. Avdeev; A.L. Kholkin; J.L. Baptista. "Synthesis by sol-gel and characterization of strontium titanate powder". Paper presented in X Portuguese Materials Society Meeting, I International Materials Symposium Materiais 2001, Coimbra, Portugal, 2001.
Edited book
  1. Jan Petzelt; Dmitry Nuzhnyy; Valentin V. Laguta; Boštjan Zalar; Luís Amaral; Ana M. R. Senos; Alexander Tkach; et al. Strontium Titanate: Synthesis, Properties and Uses. New York, United States: Nova Science Publishers, Inc.. 2019.
    Published • Editor
Journal article
  1. Ribeiro, Camila; Tkach, Alexander; Costa, M. Elisabete; Vilarinho, Paula M.. "Exploring the low temperature fabrication and properties of barium strontium titanate tunable dielectric ceramics". Journal of the European Ceramic Society 44 8 (2024): 4985-4991. http://dx.doi.org/10.1016/j.jeurceramsoc.2024.02.041.
    Open access • Published • 10.1016/j.jeurceramsoc.2024.02.041
  2. Sá, Fernando G.; Silva, Mariana R.F.; Sierra, Dayana L.Guzmán; Ivanov, Maxim; Tkach, Alexander; Vilarinho, Paula M.; Ferreira, Paula. "Comparative microwave- and conventional oven-assisted hydrothermal syntheses of BaTiO3 nanoparticles for improved electroceramics". Ceramics International 50 6 (2024): 9096-9104. http://dx.doi.org/10.1016/j.ceramint.2023.12.223.
    Open access • Published • 10.1016/j.ceramint.2023.12.223
  3. Okhay, Olena; Tkach, Alexander. "A comprehensive review of the use of porous graphene frameworks for various types of rechargeable lithium batteries". Journal of Energy Storage 80 (2024): 110336. http://dx.doi.org/10.1016/j.est.2023.110336.
    Open access • Published • 10.1016/j.est.2023.110336
  4. Tkach, Alexander; Okhay, Olena. "Comment on "Enhancing the output performance of hybrid nanogenerators based on Al-doped BaTiO3 composite films: a self-powered utility system for portable electronics", by B. Dudem, L. K. Bharat, H. Patnam, A. R. Mule and J. S. Yu, J. Mater. Chem. A, 2018, 6, 16101". Journal of Materials Chemistry A 11 46 (2023): 25756-25758. http://dx.doi.org/10.1039/d3ta01041d.
    Published • 10.1039/d3ta01041d
  5. Tkach, Alexander; Okhay, Olena. "Ceramics and Nanostructures for Energy Harvesting and Storage". Nanomaterials 13 22 (2023): 2912. http://dx.doi.org/10.3390/nano13222912.
    Open access • Published • 10.3390/nano13222912
  6. Pinho, Rui; Vilarinho, Rui; Moreira, J. Agostinho; Zorro, Fátima; Ferreira, Paulo; Ivanov, Maxim; Tkach, Alexander; Costa, M. Elisabete; Vilarinho, Paula M.. "Stress induced effects on piezoelectric polycrystalline potassium sodium niobate thin films". Journal of Materials Chemistry C 11 23 (2023): 7758-7771. https://doi.org/10.1039/D2TC05538D.
    Open access • Published • 10.1039/D2TC05538D
  7. Nuzhnyy, Dmitry; Petzelt, Jan; Bovtun, Viktor; Kempa, Martin; Repcek, Dalibor; Tkach, Alexander; Vilarinho, Paula M.; Kamba, Stanislav. "High-frequency dielectric properties of K1-xLixTaO3 ceramics compared to crystals". Journal of the European Ceramic Society 43 12 (2023): 5241-5247. http://dx.doi.org/10.1016/j.jeurceramsoc.2023.04.037.
    Open access • Published • 10.1016/j.jeurceramsoc.2023.04.037
  8. Pinho, Rui; Bretos, Iñigo; Jimenez, Ricardo; Calzada, M. Lourdes; Hortigüela, María J.; Otero-Irurueta, Gonzalo; Ivanov, Maxim; et al. "Low-temperature solution processing route for potassium sodium niobate (KNN) thin films". Journal of the European Ceramic Society 43 11 (2023): 4740-4747. http://dx.doi.org/10.1016/j.jeurceramsoc.2023.03.036.
    Published • 10.1016/j.jeurceramsoc.2023.03.036
  9. Alemayehu, Adam; Biesuz, Mattia; Javan, Kimia Y.; Tkach, Alexander; Vilarinho, Paula M.; Sglavo, Vincenzo M.; Tyrpekl, Václav. "Ultrafast high-temperature sintering of gadolinia-doped ceria". Journal of the European Ceramic Society 43 11 (2023): 4837-4843. http://dx.doi.org/10.1016/j.jeurceramsoc.2023.04.025.
    Published • 10.1016/j.jeurceramsoc.2023.04.025
  10. Okhay, Olena; Tkach, Alexander. "Current Achievements in Flexible Piezoelectric Nanogenerators Based on Barium Titanate". Nanomaterials 13 6 (2023): 988. http://dx.doi.org/10.3390/nano13060988.
    Open access • Published • 10.3390/nano13060988
  11. Okhay, Olena; Vilarinho, Paula M.; Tkach, Alexander. "Structure, Microstructure, and Dielectric Response of Polycrystalline Sr1-xZnxTiO3 Thin Films". Coatings 13 1 (2023): 165. http://dx.doi.org/10.3390/coatings13010165.
    Open access • Published • 10.3390/coatings13010165
  12. Okhay, Olena; Tkach, Alexander. "Polyaniline-Graphene Electrodes Prepared by Electropolymerization for High-Performance Capacitive Electrodes: A Brief Review". Batteries 8 10 (2022): 191. http://dx.doi.org/10.3390/batteries8100191.
    Open access • Published • 10.3390/batteries8100191
  13. Ricardo Serrazina; Alexander Tkach; Luis Pereira; Ana M. R. Senos; Paula M. Vilarinho. "Flash Sintered Potassium Sodium Niobate: High-Performance Piezoelectric Ceramics at Low Thermal Budget Processing". Materials 15 19 (2022): 6603. https://doi.org/10.3390/ma15196603.
    Open access • Published
  14. Pinho, Rui; Tkach, Alexander; Carpenter, Michael A.; Noudem, Jacques; Costa, M. Elisabete; Vilarinho, Paula M.. "Elastic moduli of potassium sodium niobate ceramics: Impact of spark plasma texturing". Scripta Materialia 218 (2022): 114837. http://dx.doi.org/10.1016/j.scriptamat.2022.114837.
    Published • 10.1016/j.scriptamat.2022.114837
  15. Okhay, Olena; Tkach, Alexander. "Synergetic Effect of Polyaniline and Graphene in Their Composite Supercapacitor Electrodes: Impact of Components and Parameters of Chemical Oxidative Polymerization". Nanomaterials 12 15 (2022): 2531. http://dx.doi.org/10.3390/nano12152531.
    Published • 10.3390/nano12152531
  16. Okhay, Olena; Bastos, Alexandre Cunha; Andreeva, Kateryna; Tuukkanen, Sampo; Tkach, Alexander. "Reduced Graphene Oxide - Polycarbonate Electrodes on Different Supports for Symmetric Supercapacitors (Feature paper)". C 8 1 (2022): 12. http://dx.doi.org/10.3390/c8010012.
    Open access • Published • 10.3390/c8010012
  17. Okhay, Olena; Vilarinho, Paula M.; Tkach, Alexander. "Low-Temperature Dielectric Response of Strontium Titanate Thin Films Manipulated by Zn Doping". Materials 15 3 (2022): 859. http://dx.doi.org/10.3390/ma15030859.
    Open access • Published • 10.3390/ma15030859
  18. Su, Xinming; Tkach, Alexander; Krupka, Jerzy; Vilarinho, Paula M.. "High Q Dielectric Titanium Tellurite Thick Films on Alumina Substrates for High Frequency Telecommunications". Materials 15 2 (2022): 467. https://doi.org/10.3390/ma15020467.
    Open access • Published • 10.3390/ma15020467
  19. Bouça, Patrícia; Figueiredo, Ricardo; Wlódarkiewicz, Anna; Tkach, Alexander; Matos, Joao Nuno; Vilarinho, Paula M.; Borges de Carvalho, Nuno. "Design and Characterization of Novel Barium Strontium Titanate Thick Films for Sub-6 GHz RF Applications". IEEE Transactions on Microwave Theory and Techniques 70 1 (2022): 611-621. https://doi.org/10.1109/TMTT.2021.3125030.
    Published • 10.1109/TMTT.2021.3125030
  20. Tkach, Alexander; Garcez, Miguel; Vilarinho, Paula M.. "Electrostatic Charges of Abrasive Powders: The Role of Particle Size and Humidity". Coatings 11 12 (2021): 1520. http://dx.doi.org/10.3390/coatings11121520.
    Open access • Published • 10.3390/coatings11121520
  21. Tkach, Alexander; Okhay, Olena; Nuzhnyy, Dmitry; Petzelt, Jan; Vilarinho, Paula M.. "Polar Phonon Behaviour in Polycrystalline Bi-Doped Strontium Titanate Thin Films". Materials 14 21 (2021): 6414. https://doi.org/10.3390/ma14133585.
    Open access • Published • 10.3390/ma14133585
  22. Tkach, Alexander; Zlotnik, Sebatian; Vilarinho, Paula M.. "Dielectric Response of KTaO3 Single Crystals Weakly Co-Doped with Li and Mn". Crystals 11 10 (2021): 1222. https://doi.org/10.3390/cryst11101222.
    Open access • Published • 10.3390/cryst11101222
  23. Tkach, Alexander; Almeida, Abilio; Levin, Igor; Woicik, Joseph C.; Vilarinho, Paula M.. "Dielectric Relaxation, Local Structure and Lattice Dynamics in Mn-Doped Potassium Tantalate Ceramics". Materials 14 16 (2021): 4632. http://dx.doi.org/10.3390/ma14164632.
    Open access • Published • 10.3390/ma14164632
  24. Okhay, Olena; Tkach, Alexander. "Graphene/Reduced Graphene Oxide-Carbon Nanotubes Composite Electrodes: From Capacitive to Battery-Type Behaviour (Editor's Choice article)". Nanomaterials 11 5 (2021): 1240. http://dx.doi.org/10.3390/nano11051240.
    Open access • Published • 10.3390/nano11051240
  25. Okhay, Olena; Tkach, Alexander. "Impact of Graphene or Reduced Graphene Oxide on Performance of Thermoelectric Composites". C 7 2 (2021): 37. http://dx.doi.org/10.3390/c7020037.
    Open access • Published • 10.3390/c7020037
  26. Guzmán Sierra, Dayana L; Bdikin, Igor; Tkach, Alexander; Vilarinho, Paula M; Nunes, Claudia; Ferreira, Paula. "Flexible piezoelectric chitosan and barium titanate biocomposite films for sensor applications". European Journal of Inorganic Chemistry 2021 9 (2021): 792-803. http://dx.doi.org/10.1002/ejic.202000938.
    Published • 10.1002/ejic.202000938
  27. Tkach, Alexander; Okhay, Olena. "Comment on "Hole-pinned defect-dipoles induced colossal permittivity in Bi doped SrTiO3 ceramics with Sr deficiency"". Journal of Materials Science & Technology 65 (2021): 151-153. https://doi.org/10.1016/j.jmst.2020.05.064.
    Published • 10.1016/j.jmst.2020.05.064
  28. Tkach, Alexander; Okhay, Olena. "Comment on "Point defect structure of La-doped SrTiO3 ceramics with colossal permittivity"". Scripta Materialia 190 (2021): 38-39. https://doi.org/10.1016/j.scriptamat.2020.08.032.
    Published • 10.1016/j.scriptamat.2020.08.032
  29. Okhay, Olena; Tkach, Alexander; Hortiguela Gallo, Maria J.; Otero-Irurueta, Gonzalo; Mikhalev, Sergey; Staiti, Pietro; Lufrano, Francesco. "Energy storage of supercapacitor electrodes on carbon cloth enhanced by graphene oxide aerogel reducing conditions". Journal of Energy Storage 32 (2020): 101839. https://doi.org/10.1016/j.est.2020.101839.
    Published • 10.1016/j.est.2020.101839
  30. Kleemann, Wolfgang; Dec, Jan; Tkach, Alexander; Vilarinho, Paula M.. "SrTiO3-Glimpses of an Inexhaustible Source of Novel Solid State Phenomena". Condensed Matter 5 4 (2020): 58. http://dx.doi.org/10.3390/condmat5040058.
    Open access • Published • 10.3390/condmat5040058
  31. Okhay, Olena; Tkach, Alexander; Staiti, Pietro; Lufrano, Francesco. "Long term durability of solid-state supercapacitor based on reduced graphene oxide aerogel and carbon nanotubes composite electrodes". Electrochimica Acta 353 (2020): 136540. https://doi.org/10.1016/j.electacta.2020.136540.
    Published • 10.1016/j.electacta.2020.136540
  32. Tkach, Alexander; Okhay, Olena. "Comment on "Giant dielectric response in (Nb + Zn) co-doped strontium titanate ceramics tailored by atmosphere"". Scripta Materialia 185 (2020): 19-20. https://doi.org/10.1016/j.scriptamat.2020.04.003.
    Published • 10.1016/j.scriptamat.2020.04.003
  33. Pinho, Rui; Tkach, Alexander; Zlotnik, Sebastian; Costa, M. Elisabete; Noudem, Jacques; Reaney, Ian M.; Vilarinho, Paula M.. "Spark plasma texturing: A strategy to enhance the electro-mechanical properties of lead-free potassium sodium niobate ceramics". Applied Materials Today 19 (2020): 100566. http://dx.doi.org/10.1016/j.apmt.2020.100566.
    Published • 10.1016/j.apmt.2020.100566
  34. Tkach, Alexander; Santos, André; Zlotnik, Sebastian; Serrazina, Ricardo; Okhay, Olena; Bdikin, Igor; Costa, Maria Elisabete; Vilarinho, Paula M.. "Effect of Solution Conditions on the Properties of Sol–Gel Derived Potassium Sodium Niobate Thin Films on Platinized Sapphire Substrates". Nanomaterials 9 11 (2019): 1600. https://doi.org/10.3390/nano9111600.
    Open access • Published • 10.3390/nano9111600
  35. Okhay, Olena; Gonçalves, Gil; Dias, Catarina; Ventura, Joao; Vieira, E.M.F.; Gonçalves, L.M.V.; Tkach, Alexander. "Tuning electrical and thermoelectric properties of freestanding graphene oxide papers by carbon nanotubes and heat treatment". Journal of Alloys and Compounds 781 (2019): 196-200. https://doi.org/10.1016/j.jallcom.2018.12.033.
    Published • 10.1016/j.jallcom.2018.12.033
  36. Okhay, Olena; Zlotnik, Sebastian; Xie, Wenjie; Orlinski, Krzysztof; Hortiguela Gallo, Maria J.; Otero-Irurueta, Gonzalo; Fernandes, Antonio J.S.; et al. "Thermoelectric performance of Nb-doped SrTiO3 enhanced by reduced graphene oxide and Sr deficiency cooperation". Carbon 143 (2019): 215-222. https://doi.org/10.1016/j.carbon.2018.11.023.
    Published • 10.1016/j.carbon.2018.11.023
  37. Amaral, Luís; Tkach, Alexander; Vilarinho, Paula M.; Senos, Ana M. R.. "New Insights into the Effect of Nonstoichiometry on the Electric Response of Strontium Titanate Ceramics". The Journal of Physical Chemistry C 123 1 (2019): 710-718. https://doi.org/10.1021/acs.jpcc.8b10438.
    Published • 10.1021/acs.jpcc.8b10438
  38. Okhay, Olena; Tkach, Alexander; Nuzhnyy, Dmitry; Petzelt, Jan; Maria Vilarinho, Paula. "Polar phonons in polycrystalline SrTiO3 thin films: The role of the substrate". Ferroelectrics 532 1 (2018): 89-99. http://dx.doi.org/10.1080/00150193.2018.1499407.
    Published • 10.1080/00150193.2018.1499407
  39. Tkach, Alexander; Santos, André; Zlotnik, Sebastian; Serrazina, Ricardo; Okhay, Olena; Bdikin, Igor; Costa, Maria Elisabete; Vilarinho, Paula M.. "Strain-Mediated Substrate Effect on the Dielectric and Ferroelectric Response of Potassium Sodium Niobate Thin Films (Feature paper)". Coatings 8 12 (2018): 449. http://www.mdpi.com/2079-6412/8/12/449.
    Open access • Published • 10.3390/coatings8120449
  40. Tkach, Alexander; Resende, João; Saravanan, K. Venkata; Costa, Maria Elisabete; Diaz-Chao, Pablo; Guilmeau, Emmanuel; Okhay, Olena; Vilarinho, Paula M.. "Abnormal Grain Growth as a Method To Enhance the Thermoelectric Performance of Nb-Doped Strontium Titanate Ceramics". ACS Sustainable Chemistry & Engineering 6 12 (2018): 15988-15994. https://doi.org/10.1021/acssuschemeng.8b03875.
    Published • 10.1021/acssuschemeng.8b03875
  41. Tomczyk, Monika; Mahajan, Amit; Tkach, Alexander; Vilarinho, Paula M.. "Interface-based reduced coercivity and leakage currents of BiFeO3 thin films: A comparative study". Materials & Design 160 (2018): 1322-1334. https://doi.org/10.1016/j.matdes.2018.10.044.
    Open access • Published • 10.1016/j.matdes.2018.10.044
  42. Vilarinho, Paula M.; Fu, Zhi; Kingon, Angus I.; Tkach, Alexander. "Low loss tunable dielectric BaNd2Ti5O14 - (Ba0.5Sr0.5)TiO3 composite thick films". Scripta Materialia 155 (2018): 160-163. http://dx.doi.org/10.1016/j.scriptamat.2018.06.032.
    Published • 10.1016/j.scriptamat.2018.06.032
  43. Tkach, Alexander; Amaral, Luís; Vilarinho, Paula M.; Senos, Ana M.R.. "Oxygen vacancies as a link between the grain growth and grain boundary conductivity anomalies in titanium-rich strontium titanate". Journal of the European Ceramic Society 38 6 (2018): 2547-2552. http://dx.doi.org/10.1016/j.jeurceramsoc.2018.01.014.
    Published • 10.1016/j.jeurceramsoc.2018.01.014
  44. Tkach, Alexander; Okhay, Olena; Reaney, Ian M.; Vilarinho, Paula Maria. "Mechanical strain engineering of dielectric tunability in polycrystalline SrTiO3 thin films (2018 HOT paper)". Journal of Materials Chemistry C 6 10 (2018): 2467-2475. http://dx.doi.org/10.1039/c8tc00414e.
    Published • 10.1039/c8tc00414e
  45. Tkach, Alexander; Amaral, João S.; Zlotnik, Sebastian; Amaral, Vítor S.; Vilarinho, Paula M.. "Enhancement of the dielectric permittivity and magnetic properties of Dy substituted strontium titanate ceramics". Journal of the European Ceramic Society 38 2 (2018): 605-611. http://dx.doi.org/10.1016/j.jeurceramsoc.2017.09.007.
    Published • 10.1016/j.jeurceramsoc.2017.09.007
  46. Tkach, Alexander; Amaral, João S.; Amaral, Vitor S.; Vilarinho, Paula M.. "Dielectric spectroscopy and magnetometry investigation of Gd-doped strontium titanate ceramics (Feature article)". Journal of the European Ceramic Society 37 6 (2017): 2391-2397. http://dx.doi.org/10.1016/j.jeurceramsoc.2017.02.011.
    Published • 10.1016/j.jeurceramsoc.2017.02.011
  47. Tkach, Alexander; Okhay, Olena; Almeida, Abílio; Vilarinho, Paula M.. "Giant dielectric permittivity and high tunability in Y-doped SrTiO3 ceramics tailored by sintering atmosphere". Acta Materialia 130 (2017): 249-260. http://dx.doi.org/10.1016/j.actamat.2017.03.051.
    Published • 10.1016/j.actamat.2017.03.051
  48. Tkach, Alexander; Kehlberger, Andreas; Büttner, Felix; Jakob, Gerhard; Eisebitt, Stefan; Kläui, Mathias. "Quantitative analysis of magnetization reversal in Ni thin films on unpoled and poled (011) [PbMg1/3Nb2/3O3]0.68–[PbTiO3]0.32piezoelectric substrates". Journal of Physics D: Applied Physics 49 33 (2016): 335004. http://dx.doi.org/10.1088/0022-3727/49/33/335004.
    Published • 10.1088/0022-3727/49/33/335004
  49. Okhay, Olena; Gonçalves, Gil; Tkach, Alexander; Dias, Catarina; Ventura, Joao; Ribeiro da Silva, Manuel Fernando; Valente Gonçalves, Luís Miguel; Titus, Elby. "Thin film versus paper-like reduced graphene oxide: Comparative study of structural, electrical, and thermoelectrical properties". Journal of Applied Physics 120 5 (2016): 051706. http://dx.doi.org/10.1063/1.4958956.
    Published • 10.1063/1.4958956
  50. Tkach, Alexander; Kehlberger, Andreas; Büttner, Felix; Jakob, Gerhard; Eisebitt, Stefan; Kläui, Mathias. "Modification of magnetic anisotropy in Ni thin films by poling of (011) PMN-PT piezosubstrates". Ferroelectrics 499 1 (2016): 135-142. http://dx.doi.org/10.1080/00150193.2016.1167519.
    Published • 10.1080/00150193.2016.1167519
  51. Rafiq, Muhammad Asif; Tkach, Alexander; Costa, Maria Elisabete; Vilarinho, Paula Maria. "Defects and charge transport in Mn-doped K0.5Na0.5NbO3 ceramics". Physical Chemistry Chemical Physics 17 37 (2015): 24403-24411. http://dx.doi.org/10.1039/c5cp02883c.
    Published • 10.1039/c5cp02883c
  52. Jin, Zuanming; Tkach, Alexander; Casper, Frederick; Spetter, Victor; Grimm, Hubert; Thomas, Andy; Kampfrath, Tobias; et al. "Accessing the fundamentals of magnetotransport in metals with terahertz probes". Nature Physics 11 9 (2015): 761-766. http://dx.doi.org/10.1038/nphys3384.
    Published • 10.1038/nphys3384
  53. Okhay, Olena; Guerra, Luis M.; Ventura, João; Tkach, Alexander; Kläui, Mathias; Krishna, Rahul; Titus, Elby. "Electrical and Magnetic Properties of Graphene Films with Ni Nanoparticles". Materials Today: Proceedings 2 1 (2015): 383-388. http://dx.doi.org/10.1016/j.matpr.2015.04.040.
    Published • 10.1016/j.matpr.2015.04.040
  54. Okhay, Olena; Krishna, Rahul; Tkach, Alexander; Kläui, Mathias; Guerra, Luis M.; Ventura, João; Titus, Elby; Gracio, Jose J.A.. "Drastic modification of graphene oxide properties by incorporation of nickel: a simple inorganic chemistry approach". Journal of Materials Science 50 9 (2015): 3425-3433. http://dx.doi.org/10.1007/s10853-015-8901-8.
    Published • 10.1007/s10853-015-8901-8
  55. Tkach, Alexander; Vilarinho, Paula M; Almeida, Abílio. "Low-temperature dielectric relaxations in Y-doped strontium titanate ceramics". Journal of Physics D: Applied Physics 48 8 (2015): 085302. http://dx.doi.org/10.1088/0022-3727/48/8/085302.
    Published • 10.1088/0022-3727/48/8/085302
  56. Rafiq, Muhammad Asif; Costa, Maria Elisabete; Tkach, Alexander; Vilarinho, Paula Maria. "Impedance Analysis and Conduction Mechanisms of Lead Free Potassium Sodium Niobate (KNN) Single Crystals and Polycrystals: A Comparison Study". Crystal Growth & Design 15 3 (2015): 1289-1294. http://dx.doi.org/10.1021/cg5016884.
    Published • 10.1021/cg5016884
  57. Tkach, Alexander; Kehlberger, Andreas; Büttner, Felix; Jakob, Gerhard; Eisebitt, Stefan; Kläui, Mathias. "Electric field modification of magnetotransport in Ni thin films on (011) PMN-PT piezosubstrates". Applied Physics Letters 106 6 (2015): 062404. http://dx.doi.org/10.1063/1.4907775.
    Published • 10.1063/1.4907775
  58. Tkach, Alexander; Baghaie Yazdi, Mehrdad; Foerster, Michael; Büttner, Felix; Vafaee, Mehran; Fries, Maximilian; Kläui, Mathias. "Magnetoelectric properties of epitaxial Fe3O4 thin films on (011) PMN-PT piezosubstrates". Physical Review B 91 2 (2015): 024405. http://dx.doi.org/10.1103/physrevb.91.024405.
    Published • 10.1103/physrevb.91.024405
  59. Mota, D. A.; Romaguera-Barcelay, Y.; Tkach, A.; Pérez de la Cruz, J.; Vilarinho, P. M.; Tavares, P. B.; Agostinho Moreira, J.; Almeida, A.. "Tackling Polar Response in Oxygen Deficient KTaO3 Thin Films". Ferroelectrics 465 1 (2014): 44-53. http://dx.doi.org/10.1080/00150193.2014.893804.
    Published • 10.1080/00150193.2014.893804
  60. Finizio, S.; Foerster, M.; Buzzi, M.; Krüger, B.; Jourdan, M.; Vaz, C.¿A.¿F.; Hockel, J.; et al. "Magnetic Anisotropy Engineering in Thin Film Ni Nanostructures by Magnetoelastic Coupling". Physical Review Applied 1 2 (2014): 021001. http://dx.doi.org/10.1103/physrevapplied.1.021001.
    Published • 10.1103/physrevapplied.1.021001
  61. Okhay, O; Tkach, A; Wu, A; Vilarinho, P M. "Manipulation of dielectric permittivity of sol–gel SrTiO3 films by deposition conditions". Journal of Physics D: Applied Physics 46 50 (2013): 505315. http://dx.doi.org/10.1088/0022-3727/46/50/505315.
    Published • 10.1088/0022-3727/46/50/505315
  62. FINIZIO, S.; FOERSTER, M.; VAZ, C. A. F.; MIX, C.; MAWASS, M. A.; TKACH, A.; KLÄUI, M.; et al. "ELECTRICAL-FIELD CONTROL OF MAGNETISM MEDIATED BY STRAIN IN Ni NANOSTRUCTURES FABRICATED ON PRE-POLED PMN–PT (011)". SPIN 03 03 (2013): 1340008. http://dx.doi.org/10.1142/s2010324713400080.
    Published • 10.1142/s2010324713400080
  63. Mota, D. A.; Romaguera-Barcelay, Y.; Tkach, A.; Pérez de la Cruz, J.; Vilarinho, P. M.; Tavares, P. B.; Agostinho Moreira, J.; Almeida, A.. "Induced polarized state in intentionally grown oxygen deficient KTaO3 thin films". Journal of Applied Physics 114 3 (2013): 034101. http://dx.doi.org/10.1063/1.4813324.
    Published • 10.1063/1.4813324
  64. Tkach, Alexander; Vilarinho, Paula M.; Kleemann, Wolfgang; Shvartsman, Vladimir V.; Borisov, Pavel; Bedanta, Subhankar. "Comment on “The Origin of Magnetism in Mn-Doped SrTiO3”". Advanced Functional Materials 23 18 (2013): 2229-2230. http://dx.doi.org/10.1002/adfm.201202314.
    Published • 10.1002/adfm.201202314
  65. Tkach, Alexander; Vilarinho, Paula M.; Almeida, Abílio. "Microscopy and the Solid Solubility Limit in K1-xMnxTaO3 Ceramics". Microscopy and Microanalysis 18 S5 (2012): 89-90. http://dx.doi.org/10.1017/s1431927612013104.
    Open access • Published • 10.1017/s1431927612013104
  66. Tkach, Alexander; Okhay, Olena; Wu, Aiying; Vilarinho, Paula M.; Bedanta, Subhankar; Shvartsman, Vladimir V.; Borisov, Pavel. "Magnetic Anomaly and Dielectric Tunability of (Sr,Mn)TiO3 Thin Films". Ferroelectrics 426 1 (2012): 274-281. http://dx.doi.org/10.1080/00150193.2012.672038.
    Published • 10.1080/00150193.2012.672038
  67. Tkach, A.; Almeida, A.; Moreira, J. Agostinho; Perez de la Cruz, J.; Romaguera-Barcelay, Y.; Vilarinho, P. M.. "Low-temperature dielectric response of NaTaO3 ceramics and films". Applied Physics Letters 100 19 (2012): 192909. http://dx.doi.org/10.1063/1.4714527.
    Published • 10.1063/1.4714527
  68. Tkach, A; Almeida, A; Agostinho Moreira, J; Chaves, M R; Espinha, A; Vilarinho, P M. "Polar behaviour induced by lithium in potassium tantalate ceramics". Journal of Physics: Condensed Matter 24 4 (2012): 045906. http://dx.doi.org/10.1088/0953-8984/24/4/045906.
    Published • 10.1088/0953-8984/24/4/045906
  69. Tkach, Alexander; Vilarinho, Paula M.; Almeida, Abílio. "Role of initial potassium excess on the properties of potassium tantalate ceramics". Journal of the European Ceramic Society 31 13 (2011): 2303-2308. http://dx.doi.org/10.1016/j.jeurceramsoc.2011.06.012.
    Published • 10.1016/j.jeurceramsoc.2011.06.012
  70. Tkach, A; Almeida, A; Moreira, J Agostinho; Espinha, A; Chaves, M R; de la Cruz, J Perez; Vilarinho, P M. "Lithium-induced dielectric relaxations in potassium tantalate ceramics". Journal of Physics D: Applied Physics 44 31 (2011): 315406. http://dx.doi.org/10.1088/0022-3727/44/31/315406.
    Published • 10.1088/0022-3727/44/31/315406
  71. Tkach, A.; Correia, T.M.; Almeida, A.; Agostinho Moreira, J.; Chaves, M.R.; Okhay, O.; Vilarinho, P.M.; Gregora, I.; Petzelt, J.. "Role of trivalent Sr substituents and Sr vacancies in tetragonal and polar states of SrTiO3". Acta Materialia 59 14 (2011): 5388-5397. http://dx.doi.org/10.1016/j.actamat.2011.05.011.
    Published • 10.1016/j.actamat.2011.05.011
  72. Okhay, Olena; Wu, Aiying; Vilarinho, Paula M.; Tkach, Alexander. "Dielectric relaxation of Sr1–1.5xBixTiO3 sol-gel thin films". Journal of Applied Physics 109 6 (2011): 064103. http://dx.doi.org/10.1063/1.3549612.
    Published • 10.1063/1.3549612
  73. Tkach, A.; Almeida, A.; Moreira, J. Agostinho; Correia, T. M.; Chaves, M. R.; Okhay, O.; Vilarinho, P. M.; Gregora, I.; Petzelt, J.. "Enhancement of tetragonality and role of strontium vacancies in heterovalent doped SrTiO3". Applied Physics Letters 98 5 (2011): 052903. http://dx.doi.org/10.1063/1.3549181.
    Published • 10.1063/1.3549181
  74. Ostapchuk, T.; Petzelt, J.; Kužel, P.; Savinov, M.; Hlinka, J.; Tkach, A.; Maria Vilarinho, P.; et al. "Lattice dynamics in Ba0.7Sr0.3TiO3: Study by THz and IR spectroscopy and ab initio simulations". Phase Transitions 83 10-11 (2010): 955-965. http://dx.doi.org/10.1080/01411594.2010.509607.
    Published • 10.1080/01411594.2010.509607
  75. Kuzian, R. O.; Laguta, V. V.; Daré, A.-M.; Kondakova, I. V.; Marysko, M.; Raymond, L.; Garmash, E. P.; et al. "Mechanisms of magnetoelectricity in manganese-doped incipient ferroelectrics". EPL (Europhysics Letters) 92 1 (2010): 17007. http://dx.doi.org/10.1209/0295-5075/92/17007.
    Published • 10.1209/0295-5075/92/17007
  76. Okhay, Olena; Wu, Aiying; Vilarinho, Paula M.; Tkach, Alexander. "Dielectric response of polycrystalline Sr1-1.5xBixTiO3 thin films under direct current bias". Applied Physics Letters 97 6 (2010): 062912. http://dx.doi.org/10.1063/1.3463472.
    Published • 10.1063/1.3463472
  77. Shvartsman, V. V.; Bedanta, S.; Borisov, P.; Kleemann, W.; Tkach, A.; Vilarinho, P. M.. "Spin cluster glass and magnetoelectricity in Mn-doped KTaO3". Journal of Applied Physics 107 10 (2010): 103926. http://dx.doi.org/10.1063/1.3430990.
    Published • 10.1063/1.3430990
  78. Okhay, Olena; Wu, Aiying; Vilarinho, Paula M.; Tkach, Alexander. "Low temperature dielectric characterization of Mg-doped SrTiO3 thin films prepared by sol-gel". Applied Physics Letters 96 15 (2010): 152906. http://dx.doi.org/10.1063/1.3360213.
    Published • 10.1063/1.3360213
  79. Levin, I.; Krayzman, V.; Woicik, J. C.; Tkach, A.; Vilarinho, P. M.. "X-ray absorption fine structure studies of Mn coordination in doped perovskite SrTiO3". Applied Physics Letters 96 5 (2010): 052904. http://dx.doi.org/10.1063/1.3298369.
    Published • 10.1063/1.3298369
  80. Tkach, Alexander; Vilarinho, Paula M.; Nuzhnyy, Dmitry; Petzelt, Jan. "Sr- and Ti-site substitution, lattice dynamics, and octahedral tilt transition relationship in SrTiO3:Mn ceramics". Acta Materialia 58 2 (2010): 577-582. http://dx.doi.org/10.1016/j.actamat.2009.09.036.
    Published • 10.1016/j.actamat.2009.09.036
  81. Ostapchuk, T; Petzelt, J; Hlinka, J; Bovtun, V; Kužel, P; Ponomareva, I; Lisenkov, S; et al. "Broad-band dielectric spectroscopy and ferroelectric soft-mode response in the Ba0.6Sr0.4TiO3 solid solution". Journal of Physics: Condensed Matter 21 47 (2009): 474215. http://dx.doi.org/10.1088/0953-8984/21/47/474215.
    Published • 10.1088/0953-8984/21/47/474215
  82. Kleemann, W.; Bedanta, S.; Borisov, P.; Shvartsman, V. V.; Miga, S.; Dec, J.; Tkach, A.; Vilarinho, P. M.. "Multiglass order and magnetoelectricity in Mn2+ doped incipient ferroelectrics". The European Physical Journal B 71 3 (2009): 407-410. http://dx.doi.org/10.1140/epjb/e2009-00222-4.
    Published • 10.1140/epjb/e2009-00222-4
  83. Kleemann, W.; Borisov, P.; Shvartsman, V.V.; Bedanta, S.; Tkach, A.; Vilarinho, P.M.. "Magnetoelectricity in multiferroically composed multilayers and multiglasses". Journal of Magnetism and Magnetic Materials 321 11 (2009): 1785-1789. http://dx.doi.org/10.1016/j.jmmm.2009.02.006.
    Published • 10.1016/j.jmmm.2009.02.006
  84. Kleemann, W; Shvartsman, V V; Bedanta, S; Borisov, P; Tkach, A; Vilarinho, P M. "(Sr,Mn)TiO3—a magnetoelectrically coupled multiglass". Journal of Physics: Condensed Matter 20 43 (2008): 434216. http://dx.doi.org/10.1088/0953-8984/20/43/434216.
    Published • 10.1088/0953-8984/20/43/434216
  85. Ostapchuk, T.; Petzelt, J.; Kuzel, P.; Veljko, S.; Tkach, A.; Vilarinho, P.; Ponomareva, I.; et al. "Infrared and THz Soft-Mode Spectroscopy of (Ba,Sr)TiO3 Ceramics". Ferroelectrics 367 1 (2008): 139-148. http://dx.doi.org/10.1080/00150190802375185.
    Published • 10.1080/00150190802375185
  86. Shvartsman, V. V.; Bedanta, S.; Borisov, P.; Kleemann, W.; Tkach, A.; Vilarinho, P. M.. "(Sr,Mn)TiO3: A Magnetoelectric Multiglass". Physical Review Letters 101 16 (2008): 165704. http://dx.doi.org/10.1103/physrevlett.101.165704.
    Published • 10.1103/physrevlett.101.165704
  87. Tkach, Alexander; Okhay, Olena; Vilarinho, Paula M; Kholkin, Andrei L. "High dielectric constant and tunability of strontium titanate ceramics modified by chromium doping". Journal of Physics: Condensed Matter 20 41 (2008): 415224. http://dx.doi.org/10.1088/0953-8984/20/41/415224.
    Published • 10.1088/0953-8984/20/41/415224
  88. Tkach, Alexander; Vilarinho, Paula M.; Reaney, Ian M.. "Structure and Microstructure of Y-doped Strontium Titanate Ceramics". Microscopy and Microanalysis 14 S3 (2008): 11-12. http://dx.doi.org/10.1017/s143192760808923x.
    Open access • Published • 10.1017/s143192760808923x
  89. Tkach, A.; Vilarinho, P.M.. "Scandium doped strontium titanate ceramics: Structure, microstructure, and dielectric properties". Boletin de la Sociedad Espanola de Ceramica y Vidrio 47 4 (2008): 238-241. http://www.scopus.com/inward/record.url?eid=2-s2.0-54949153393&partnerID=MN8TOARS.
    Open access • Published
  90. Tkach, Alexander; Vilarinho, Paula M.; Kholkin, Andrei L.; Reaney, Ian M.; Pokorny, Jan; Petzelt, Jan. "Mechanisms of the Effect of Dopants and P(O2) on the Improper Ferroelastic Phase Transition in SrTiO3". Chemistry of Materials 19 26 (2007): 6471-6477. http://dx.doi.org/10.1021/cm071795c.
    Published • 10.1021/cm071795c
  91. Trepakov, V.A.; Savinov, M.E.; Okhay, O.; Tkach, A.; Vilarinho, P.M.; Kholkin, A.L.; Gregora, I.; Jastrabik, L.. "Dielectric permittivity and Cr3+ impurity ion probe luminescence in SrTiO3 sol–gel ceramics". Journal of the European Ceramic Society 27 13-15 (2007): 3705-3707. http://dx.doi.org/10.1016/j.jeurceramsoc.2007.02.022.
    Published • 10.1016/j.jeurceramsoc.2007.02.022
  92. Laguta, V.V.; Kondakova, I.V.; Bykov, I.P.; Glinchuk, M.D.; Tkach, A.; Vilarinho, P.M.; Jastrabik, L.. "Electron spin resonance investigation of Mn2+ ions and their dynamics in Mn-doped SrTiO3". Physical Review B - Condensed Matter and Materials Physics 76 5 (2007): 054104. http://dx.doi.org/10.1103/PhysRevB.76.054104.
    Published • 10.1103/PhysRevB.76.054104
  93. Tkach, Alexander; Vilarinho, Paula M.; Kholkin, Andrei L.. "Nonlinear dc electric-field dependence of the dielectric permittivity and cluster polarization of Sr1-xMnxTiO3 ceramics". Journal of Applied Physics 101 8 (2007): 084110. http://dx.doi.org/10.1063/1.2717874.
    Published • 10.1063/1.2717874
  94. Tkach, A.; Vilarinho, P.M.; Kholkin, A.L.. "Dependence of dielectric properties of manganese-doped strontium titanate ceramics on sintering atmosphere". Acta Materialia 54 20 (2006): 5385-5391. http://dx.doi.org/10.1016/j.actamat.2006.07.007.
    Published • 10.1016/j.actamat.2006.07.007
  95. Tkach, Alexander; Araújo, Branca; Vilarinho, Paula M.. "The Influence of DC Bias on the Dielectric Response of Sr1-xCaxTiO3 Ceramics". Materials Science Forum 514-516 (2006): 240-244. http://dx.doi.org/10.4028/www.scientific.net/msf.514-516.240.
    Published • 10.4028/www.scientific.net/msf.514-516.240
  96. Tkach, A.; Vilarinho, P. M.; Kholkin, A. L.; Pashkin, A.; Veljko, S.; Petzelt, J.. "Broad-band dielectric spectroscopy analysis of relaxational dynamics in Mn-doped SrTiO3 ceramics". Physical Review B 73 10 (2006): 104113. http://dx.doi.org/10.1103/physrevb.73.104113.
    Published • 10.1103/physrevb.73.104113
  97. Tkach, Alexander; Vilarinho, Paula M.; Kholkin, Andrei L.. "Structure–microstructure–dielectric tunability relationship in Mn-doped strontium titanate ceramics". Acta Materialia 53 19 (2005): 5061-5069. http://dx.doi.org/10.1016/j.actamat.2005.07.029.
    Published • 10.1016/j.actamat.2005.07.029
  98. Tkach, A.; Vilarinho, P.M.; Senos, A.M.R.; Kholkin, A.L.. "Effect of nonstoichiometry on the microstructure and dielectric properties of strontium titanate ceramics". Journal of the European Ceramic Society 25 12 (2005): 2769-2772. http://dx.doi.org/10.1016/j.jeurceramsoc.2005.03.137.
    Published • 10.1016/j.jeurceramsoc.2005.03.137
  99. Tkach, A.; Vilarinho, P. M.; Kholkin, A. L.. "Polar behavior in Mn-doped SrTiO3 ceramics". Applied Physics Letters 86 17 (2005): 172902. http://dx.doi.org/10.1063/1.1920414.
    Published • 10.1063/1.1920414
  100. Tkach, A.; Vilarinho, P. M.; Kholkin, A. L.; Pashkin, A.; Samoukhina, P.; Pokorny, J.; Veljko, S.; Petzelt, J.. "Lattice dynamics and dielectric response of Mg-doped SrTiO3 ceramics in a wide frequency range". Journal of Applied Physics 97 4 (2005): 044104. http://dx.doi.org/10.1063/1.1849822.
    Published • 10.1063/1.1849822
  101. Tkach, A.; Vilarinho, P.M.; Kholkin, A.. "Effect of Mg doping on the structural and dielectric properties of strontium titanate ceramics". Applied Physics A 79 8 (2004): 2013-2020. http://dx.doi.org/10.1007/s00339-003-2341-z.
    Published • 10.1007/s00339-003-2341-z
  102. Tkach, Alexander; Vilarinho, Paula M.; Kholkin, Andréi L.; Reaney, Ian M.; Petzelt, Jan. "Structural and Dielectric Properties of Mg-Doped Strontium Titanate Ceramics: Dependence on the Materials Processing". Materials Science Forum 455-456 (2004): 40-44. http://dx.doi.org/10.4028/www.scientific.net/msf.455-456.40.
    Published • 10.4028/www.scientific.net/msf.455-456.40
  103. Tkach, A; Vilarinho, P.M.; Kholkin, A.L.. "Structural and Dielectric Properties of Mn-Doped Strontium Titanate Ceramics". Ferroelectrics 304 1 (2004): 87-90. http://dx.doi.org/10.1080/00150190490454620.
    Published • 10.1080/00150190490454620
  104. Trepakov, V.A.; Kudyk, I.B.; Kapphan, S.E.; Savinov, M.E.; Pashkin, A.; Jastrabik, L.; Tkach, A.; Vilarinho, P.M.; Kholkin, A.L.. "Critical phonons and R- zero-phonon emission line of Cr3+ in Mg-doped SrTiO3". Journal of Luminescence 102-103 (2003): 536-542. http://dx.doi.org/10.1016/s0022-2313(02)00598-7.
    Published • 10.1016/s0022-2313(02)00598-7
  105. Trepakov, V. A.; Savinov, M. E.; Kudyk, I. B.; Pashkin, A.; Kapphan, S. E.; Vilarinho, P. M.; Tkach, A.; Kholkin, A. L.; Jastrabik, L.. "Dielectric Permittivity and Cr3+ Impurity Luminescence of Sr0.99Mg0.01TiO3 and SrTi0.99Mg0.01O3". Ferroelectrics 294 1 (2003): 229-238. http://dx.doi.org/10.1080/714040612.
    Published • 10.1080/714040612
  106. Tkach, Alexander; Vilarinho, Paula M.; Avdeev, Maxim; Kholkin, Andrei L.; Baptista, J.L.. "Synthesis by sol-gel and characterization of strontium titanate powder". Key Engineering Materials 230-232 (2002): 40-43. http://dx.doi.org/10.4028/www.scientific.net/KEM.230-232.40.
    Published • 10.4028/www.scientific.net/KEM.230-232.40
Magazine article
  1. Serrazina, R. (DD15-164F-444C); Figueiredo, L.; Ribeiro, C.A.; Tkach, A. (FF15-D360-6EAE); Salgado, J.; Santos, R.; Jorge, H.; et al. "Exploração da sustentabilidade da sinterização FLASH na produção industrial de grés porcelânico", Revista Técnica de Cerâmica e Vidro, 2020, https://issuu.com/ctcv/docs/tecnica-julho-vs4_final.
  2. Tkach, A. (FF15-D360-6EAE); Vilarinho, P.M.; Levin, I.; Krayzman, V.; Woicik, J.C.. "The role of a dopant: x-ray absorption fine structure studies of Mn coordination in doped SrTiO3 perovskite", Highlighting CICECO Science, Associate Laboratories´ Review 2010, 2010, http://www.ciceco.ua.pt/files/highl10.pdf.
Preface / Postscript
  1. Tkach, Alexander; Vilarinho, Paula. "Preface". Preface to Strontium Titanate: Synthesis, Properties and Uses, edited by Tkach, Alexander; Vilarinho, Paula. New York, United States: Nova Science Publishers. 2019.
    Published
Thesis / Dissertation
  1. Tkach, Alexander. "Strontium titanate based ceramics for tunable device application". PhD, Universidade de Aveiro, 2005.

Other

Other output
  1. Front cover: Flexible Piezoelectric Chitosan and Barium Titanate Biocomposite Films for Sensor Applications. The Front Cover shows a flexible functional biocomposite film composed of chitosan biopolymer and BaTiO3 particles, which was prepared by environmentally benign methodologies. This film is flexible, and its elasticity can be tailored by the addition of BaTiO3 particles. The evidence of piezoelectricity turns this material promising for the design of flexible piezoelectric sensor films.. 2021. Guzman Sierra, Dayana; Igor Bdikin; Alexander Tkach; Paula M. vilarinho; Claudia Nunes; Paula Celeste da Silva Ferreira. https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/ejic.202100085.
Activities

Oral presentation

Presentation title Event name
Host (Event location)
2024/03/21 Polar phonon behaviour in polycrystalline Bi-doped strontium titanate thin films DPG Spring Meeting 2024
German Physical Society (DPG) (Berlin, Germany)
2023/11/24 Keynote Talk "Thermoelectric materials modified by graphene" International Summit on Material Science and Nanoscience
Spectrum conferences (Lisbon, Portugal)
2023/11/23 Keynote Talk "Development of giant permittivity dielectrics based on strontium titanate" International Summit on Material Science and Nanoscience
Spectrum conferences (Lisbon, Portugal)
2023/11/22 Keynote Talk "Behind the high electrical performance of flash sintered potassium sodium niobate piezoelectric ceramics" International Conference on Nanotechnology Research and Innovation (ICNTRI-2023)
(Aveiro (Online), Portugal)
2023/11/07 Behind the high electrical performance of flash sintered potassium sodium niobate piezoelectric ceramics Electroceramics for End Users XII – PIEZO 2023
(Glasgow, United Kingdom)
2023/09/18 Keynote Talk "Electrical Performance of Potassium Sodium Niobate Enhanced by Flash Sintering and Electrode Annealing" 2nd International Meet & Expo on Materials Science and Nanomaterials Conference (Materialsmeet2023)
Albedo Meetings (Lisbon, Portugal)
2023/07/03 Dielectric Relaxation, Local Structure and Lattice Dynamics in Mn-Doped Potassium Tantalate Ceramics 18th Conference & Exhibition of the European Ceramic Society ECerS 2023
European Ceramic Society (Lyon, France)
2023/06/29 Keynote talk "Engineering of giant permittivity dielectrics based on strontium titanate" 7th International Conference on Material Science and Engineering
Coalesce Research Group (Barcelona, Spain)
2023/05/29 Invited Talk "Aerogel materials for capacitive electrodes in energy storage devices" E-MRS 2023 Spring Meeting
(Strasbourg, France)
2023/04/25 Invited Talk "Graphene in Thermoelectrics" International Summit on Graphene & 2D Materials (ISG2D2023)
(Valencia, Spain)
2023/04 Ultra-low temperature fabrication of Ba0.6Sr0.4TiO3 dielectric ceramics XXI Portuguese Materials Society Congress, XII International Symposium on Materials - Materiais 2023
SPM (Guimaraes, Portugal)
2023/04 FDM Capacitive Sensors XXI Portuguese Materials Society Congress, XII International Symposium on Materials - Materiais 2023
SPM (Guimaraes, Portugal)
2023/03/22 Behind the high electrical performance of flash sintered potassium sodium niobate piezoelectric ceramics Electric Field Enhanced Processing of Advanced Materials III - ECI Meeting 2023
ECI (Tomar, Portugal)
2023/03/21 Effect of microstrutural refinement on electrical properties of BST-based ceramics prepared by spark plasma sintering and spark plasma texturing Electric Field Enhanced Processing of Advanced Materials III - ECI Meeting 2023
ECI (Tomar, Portugal)
2022/10/28 Invited Talk "Thermoelectric performance of Nb-doped SrTiO3 ceramics enhanced by abnormal grain growth" 3-day International Conference on Materials Science (3d-ICOMAS)
(Verona, Italy)
2022/09/18 Invited Talk "Enhanced performance of oxide thermoelectrics by reduced graphene oxide nanoadditive and nanostructuring" 11th Global Conference on Materials Science and Engineering (CMSE 2022)
(Shenzhen (Online), China)
2022/07 Gadolinium-doped ceria electrolytes by ultrafast high-temperature sintering ECerS XVII, ICC9 and Electroceramics XVIII
ECerS (Krakow, Poland)
2022/07 RF Phase Shifters Design Based on Barium Strontium Titanate Thick and Thin Films 2022 IEEE MTT-S International Conference on Microwave Acoustics and Mechanics (IC-MAM)
IEEE (Munich, Germany)
2022/04 Radio Frequency phase shifter based on BST thick films prepared by Electrophoretic deposition method XX Portuguese Materials Society Congress, XI International Symposium on Materials - Materiais 2022
SPM (Marinha Grande, Portugal)
2022/04 Hydrothermal synthesis of Barium Titanate nanoparticles: the effect of the heating system XX Portuguese Materials Society Congress, XI International Symposium on Materials - Materiais 2022
SPM (Marinha Grande, Portugal)
2022/04 Spark Plasma Sintered and Textured Ba0.7Sr0.3TiO3 Ceramics with Microstructure Defined Electrical Properties XX Portuguese Materials Society Congress, XI International Symposium on Materials - Materiais 2022
SPM (Marinha Grande, Portugal)
2021/08/03 Invited Talk "A role of the perovskite lattice vacancies in antiferrodistortive phase transition of doped strontium titanate ceramics" The 10th Global Conference on Materials Science and Engineering
(Kyiv (Online), Ukraine)
2021/07/09 Keynote Talk "Antiferrodistortive phase transition in doped strontium titanate ceramics: a role of the perovskite lattice vacancies" 4th International Conference on Nanomaterials Science and Mechanical Engineering
(Aveiro (Online), Portugal)
2021/07/08 Electromechanical characterization of chitosan-based films 4th International Conference on Nanomaterials Science and Mechanical Engineering
(Aveiro (Online), Portugal)
2021/07/07 Keynote Talk "Hydrothermal synthesis of barium titanate nanoparticles using a conventional oven and a microwave-assisted reactor" 4th International Conference on Nanomaterials Science and Mechanical Engineering
(Aveiro (Online), Portugal)
2021/06 Barium Strontium Titanate Thick Films for Tunable Software-Defined Radio Front-Ends 2021 IEEE MTT-S International Microwave Symposium (IMS 2021)
IEEE (Atlanta (Online), United States)
2021/02/22 Microwave-assisted versus conventional oven hydrothermal synthesis of piezoelectric BaTiO3 nanoparticles 11th International Meeting `Electroceramics for End Users XI - PIEZO 2021‘
(Sassari (Online), Italy)
2020/11/21 Invited Talk "Giant Dielectric Permittivity in Doped Strontium Titanate Ceramics" The 9th Global Conference on Materials Science and Engineering (CMSE 2020)
(Kyiv (Online), Ukraine)
2020/08 Potassium Sodium Niobate ceramics: a critical study of the electrical responses Electroceramics XVII 2020
(Darmstadt (Online), Germany)
2020/08 BST thick films produced by electrophorectic deposition for radio frequency applications Electroceramics XVII 2020
(Darmstadt (Online), Germany)
2020/07/10 Keynote talk "Aliovalent Doping Engineering in SrTiO3-based Electroceramics" 3rd International Conference on Nanomaterials Science and Mechanical Engineering
(Online)
2019/07/12 Keynote talk "Strain Mediated Substrate Effect on the Properties of Polar Dielectric Thin Films" 2nd International Conference on Nanomaterials Science and Mechanical Engineering
(Aveiro, Portugal)
2019/07 Keynote talk "Utilizing Reduced Graphene Oxide for Harvesting / Storage Energy" 2nd International Conference on Nanomaterials Science and Mechanical Engineering
(Aveiro, Portugal)
2018/09/11 Invited talk "Strain Effect on the Properties of Polar Dielectric Thin Films" 2018 IEEE 8th International Conference on Nanomaterials: Applications & Properties (NAP-2018)
(Zatoka, Ukraine)
2018/08/21 Invited talk "Enhanced Performance of Oxide Thermoelectrics by Nanostructuring and Reduced Graphene Oxide Nanoadditive" International Conference on Advanced Structural and Functional Materials 2018 (ICAS2018)
(Krakow, Poland)
2018/07/09 Abnormal grain growth as a method to enhance the thermoelectric performance of Nb-doped strontium titanate ceramics Electroceramics XVI
(Hasselt, Belgium)
2018/07 Invited talk "Thermoelectric Performance of Nb Doped SrTiO3 Enhanced by Reduced Graphene Oxide" 2nd International Conference & Expo on Green Chemistry and Engineering
(Barcelona, Spain)
2018/04 Conduction Mechanisms of Lead Free Potassium Sodium Niobate (KNN) Single Crystals and Polycrystals IMAPS/ACerS 14th International Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies (CICMT 2018)
(Aveiro, Portugal)
2018/04 Strain Effect on the Properties of K0.5Na0.5NbO3 Thin Films IMAPS/ACerS 14th International Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies (CICMT 2018)
(Aveiro, Portugal)
2017/12 Invited talk “Exploring strategies for low loss tunable dielectrics” International Symposium Integrated Functionalities (ISIF-2017)
(New Delhi, India)
2017/07/10 Giant dielectric permittivity and high tunability in Y-doped SrTiO3 ceramics tailored by sintering atmosphere 15th Conference & Exhibition of the European Ceramic Society ECerS 2017
(Budapest, Hungary)
2016/07 Resolving the Fundamentals of Magnetotransport in Metals with Ultrafast Terahertz Spectroscopy International Conference on Ultrafast Phenomena UP 2016
(Santa Fe, New Mexico, United States)
2016/07 Electrical Conductivity and Structural Properties of Reduced Graphene Oxide Based Samples First International Conference and Workshop on Mechanical Engineering Research – Research Trends in Mechanical Engineering RTME 2016
(Aveiro, Portugal)
2016/06/02 Invited talk "Magnetoelectric Multiferroics: From Intrinsic Multiglass to Hybrid Magnetoelectric Structures" 6th International Advances in Applied Physics and Materials Science Congress & Exhibition APMAS 2016
(Istanbul, Turkey)
2014/09 Strain mediated electric field manipulation of spin structure in Nickel nanostructures on PMN-PT (110) LEEM / PEEM 9 workshop
(Berlin, Germany)
2014/07 Polar behavior of oxygen deficient KTaO3 thin films prepared by rf sputtering European Conference on Applications of Polar Dielectrics ECAPD 2014
(Vilnius, Lithuania)
2014/06 Probing Giant Magnetoresistance with THz Spectroscopy Conference on Lasers & Electro-optics: Quantum Electronics and Laser Science Conference CLEO 2014
(San Jose, California, United States)
2013/09 Unraveling the effect of oxygen deficiency in KTaO3 thin films 13th International Meeting on Ferroelectricity IMF 2013
(Krakow, Poland)
2013/07/09 IFOX-project 30-month status report JGUM IFOX-project 30 months meeting
(Glasgow, United Kingdom)
2013/01/17 IFOX-project 24-month status report JGUM IFOX-project 24 months meeting
(Enschede, Netherlands)
2012/09/27 Invited lecture "Mn-doped Incipient Ferroelectrics" Prof. Klaeui group seminar
Johannes Gutenberg University of Mainz (Mainz, Germany)
2012/07 Soft-mode response in BaxSr1-xTiO3 and the problem of its adequate description Joint ISAF/ECAPD/PFM Meeting 2012
(Aveiro, Portugal)
2011/06 Enhancement of tetragonality and role of strontium vacancies in heterovalent doped strontium titanate 12th European Meeting on Ferroelectricity EMF 2011
(Bordeaux, France)
2011/02/04 Lithium-induced dielectric relaxations in potassium tantalate ceramics Jornadas IFIMUP
(Porto, Portugal)
2010/11 Effect of Mn Coordination on Dielectric and Magnetic Responses in Mn-doped Perovskite-like Incipient Ferroelectrics 2010 MRS Fall Meeting
(Boston, United States)
2009/08 Magnetoelectric multiglass states in Mn-doped incipient ferroelectrics 12th International Meeting on Ferroelectricity and 18th IEEE International Symposium on Applications of Ferroelectrics
(Xi'an, China)
2009/08 New findings within BaxSr1-xTiO3 lattice dynamics studies 12th International Meeting on Ferroelectricity and 18th IEEE International Symposium on Applications of Ferroelectrics
(Xi'an, China)
2009/06/15 Effect of heterovalent ion substitution in incipient ferroelectric ceramics on their dynamic properties V Jornadas IFIMUP
(Porto, Portugal)
2009/03 Multiglassy systems based on incipient ferroelectrics DPG Spring Meeting
(Dresden, Germany)
2008/11 (Sr,Mn)TiO3 - a magnetoelectric multiglass 53rd Magnetism and Magnetic Materials Conference
(Austin, Texas, United States)
2008/09 Magnetoelectric effect in Mn-doped SrTiO3 ceramics Electroceramics X
(Manchester, United Kingdom)
2008/09 Impedance spectroscopy of nonstoichiometric strontium titanate ceramics Electroceramics X
(Manchester, United Kingdom)
2008/06/18 Preparation and characterization of potassium lithium tantalate ceramic targets IV Jornadas IFIMUP
(Porto, Portugal)
2008/04/18 Invited lecture "Preparation and Characterisation of Mn-doped Strontium Titanate Ceramics" Prof. Kleemann group seminar
University of Duisburg-Essen (Duisburg, Germany)
2008/02 (Sr,Mn)TiO3 - a magnetoelectric multiglass 72nd Annual Meeting of the Deutsche Physikalische Gesellschaft DPG 2008
(Berlin, Germany)
2007/12/06 Structure and Microstructure of Y-doped Strontium Titanate Ceramics International Conference on Microscopy and Microanalysis INCOMAM´07
(Coimbra, Portugal)
2007/09 Doping and oxygen partial pressure effects on the improper ferroelastic phase transition in SrTiO3 31st International Symposium on the Dynamic Properties of Solids DyProSo XXXI
(Porto, Portugal)
2007/06 TSDC study of manganese doped strontium titanate ceramics Electroceramica 2007
(Aveiro, Portugal)
2007/06 Low-Temperature Dielectric Relaxations in Sr1-1.5xYxTiO3 Ceramics 10th International Conference and Exhibition of the European Ceramic Society ECerS 2007
(Berlin, Germany)
2007/01/11 Utilization of TEM for the characterisation of doped incipient ferroelectrics IV Jornadas CICECO
(Aveiro, Portugal)
2006/11 Octahedral-tilt-transition and defect ordering in SrTi0.95Mn0.05O3-d ceramics 2006 MRS Fall Meeting
(Boston, United States)
2006/09 Invited talk "Modification of the Incipient Ferroelectric Behaviour of SrTiO3" 8th European Conference on Applications of Polar Dielectrics ECAPD VIII
(Metz, France)
2006/06 Invited talk "Tailored Strontium Titanate for Tunable Devices: Structural and Dielectric Analysis" MMA 2006 - Microwave Materials And Their Applications
(Oulu, Finland)
2006/06 Sintering studies of nonstoichiometric strontium titanate ceramics Electroceramics X
(Toledo, Spain)
2005/09 Lattice dynamics and dielectric response of Mn-doped SrTiO3 ceramics in a wide frequency range 11th International Meeting on Ferroelectricity IMF 2005
(Foz do Iguaçu, Brazil)
2005/04 Effect of the lattice site substitution on the structural phase transition in manganese-doped strontium titanate ceramics FAME - Homogeneous Materials, Mixed Conductors and Mixed Anion Materials, Management Committee Meeting and Working Group Workshop
(Sheffield, United Kingdom)
2005/01/07 Dependence of the dielectric response on the lattice site substitution in Mg-doped and Mn-doped strontium titanate ceramics II Jornadas CICECO
(Aveiro, Portugal)
2004/12 Dielectric Polarisation and Relaxor-Type Behaviour in Sr1-xMnxTiO3 Ceramics 2004 MRS Fall Meeting
(Boston, United States)
2004/11 Mn-doped SrTiO3 ceramics: dependence of the dielectric response on the lattice site substitution COST 525 - Advanced Electroceramics: Grain Boundary Engineering, Management Committee Meeting and Working Group Workshop
(Limerick, Ireland)
2004/06 Lattice dynamics and dielectric response of Mg-doped SrTiO3 ceramics in a wide frequency range Electroceramics IX
(Cherbourg, France)
2003/11/15 Effect of Mg Doping on the Structural and Dielectric Properties of Strontium Titanate Ceramics COST 525 - Advanced Electroceramics: Grain Boundary Engineering, Management Committee Meeting and Working Group Workshop
(Prague, Czech Republic)

Supervision

Thesis Title
Role 		Degree Subject (Type)
Institution / Organization
2020/11 - 2023/12/19 Studies of the influence of abrasive grain morphology on the performance of high-yield polishing in the automotive industry - Master Internship with INDASA Abrasives
Co-supervisor
 Engenharia de Materiais (Master)
Universidade de Aveiro, Portugal
2021/11 - 2023/12/15 Flexible lead-free and carbon-added piezoelectric composites for energy harvesting
Co-supervisor
 Engenharia de Materiais (Master)
Universidade de Aveiro, Portugal
2023/02 - 2023/12/07 Additive manufacturing of polymeric matrices with capacitive and haptic properties - Master Thesis with Simoldes Plasticos
Co-supervisor
 Engenharia de Materiais (Master)
Universidade de Aveiro, Portugal
2023/03 - 2023/07 Manufatura aditiva de sensores para a industria automóvel - Industrial Project with Simoldes Plasticos
Co-supervisor
 Projeto Industrial (Scientific initiation)
Universidade de Aveiro, Portugal
2023/03 - 2023/07 Flash Sintering de Porcelana - Industrial Project with Costa Verde SA
Co-supervisor
 Projeto Industrial (Scientific initiation)
Universidade de Aveiro, Portugal
2023/03 - 2023/07 Caracterização estrutural, microestrutural e elétrica de alumina de alta pureza - Industrial Project with Rauschert Portuguesa
Co-supervisor
 Projeto Industrial (Scientific initiation)
Universidade de Aveiro, Portugal
2021/11 - 2022/12/16 Circuitos low power emissores de luz ou capazes de alterar a sua cor através de estímulos eléctricos - Master Internship with Heliotextil
Co-supervisor
 Engenharia de Materiais (Master)
Universidade de Aveiro CICECO, Portugal
2022/03/27 - 2022/07/15 Estudo de novos abrasivos cerâmicos para polimento de elevado desempenho - Industrial Project with INDASA Abrasives
Co-supervisor
 Projeto Industrial (Scientific initiation)
Universidade de Aveiro, Portugal
2021/03/22 - 2021/07/08 Estudos para a caracterização de cargas superficiais de abrasivos cerâmicos para lixagem de elevado rendimento na indústria automóvel - Industrial Project with INDASA Abrasives
Co-supervisor
 Projeto Industrial (Scientific initiation)
Universidade de Aveiro, Portugal
2021/03/22 - 2021/06/08 Desenvolvimento de novos abrasivos de elevado para polimento de elevado rendimento na indústria automóvel - Industrial Project with INDASA Abrasives
Supervisor
 Projeto Industrial (Scientific initiation)
Universidade de Aveiro, Portugal
2020/01 - 2021/02 Alternative sintering of ceramics by FLASH: a case study on alumina and alumina structures - Master Internship with Porcelanas Costa Verde SA
Co-supervisor
 Engenharia de Materiais (Master)
Universidade de Aveiro, Portugal
2018/11 - 2021/02 Optimization of deposition in high performance flexible abrasives - Master Project with INDASA Abrasives
Co-supervisor
 Engenharia de Materiais (Master)
Universidade de Aveiro, Portugal
2018/11 - 2019/10 Flash as alternative sintering technology of porcelain stoneware - Master Internship with Revigrés
Co-supervisor
 Engenharia de Materiais (Master)
Universidade de Aveiro, Portugal
2017/10 - 2018/12 Low temperature development of ZnO components by FLASH sintering - Master Internship with Rauschert Portuguesa
Co-supervisor
 Engenharia de Materiais (Master)
Universidade de Aveiro, Portugal
2018/01/01 - 2018/02/28 Post-doctoral research fellowship within the FCT project "Multifunctional all-oxide nanostructures for electronic applications" (IF/00602/2013/CP1162/CT0015)
Supervisor
 Engenharia de Materiais (Other)
Universidade de Aveiro CICECO, Portugal
2016/03/01 - 2017/12/31 Post-doctoral FCT grant "Ni doped carbon-based materials for sensor application" (SFRH/BPD/77704/2011)
Co-supervisor
 Engenharia de Materiais (Other)
Universidade de Aveiro, Portugal

Fundação para a Ciência e a Tecnologia, Portugal
2016/10 - 2017/12 Strain effect on the properties of K0.5Na0.5NbO3 films - Master Thesis
Supervisor
 Engenharia de Materiais (Master)
Universidade de Aveiro, Portugal
2016/07/01 - 2017/01/31 Post-doctoral research fellowship within the FCT project "Multifunctional all-oxide nanostructures for electronic applications" (IF/00602/2013/CP1162/CT0015)
Supervisor
 Engenharia de Materiais (Other)
Universidade de Aveiro CICECO, Portugal

Event organisation

Event name
Type of event (Role) 		Institution / Organization
2022/11/17 - 2022/11/18 Workshop on Energy and Decarbonization of the Ceramics Industry (2022/11/17 - 2022/11/18)
Workshop (Member of the Organising Committee)
 Universidade de Aveiro, Portugal
2017/04/09 - 2017/04/12 VIII International Symposium on Materials "MATERIAIS 2017" (2017/04/09 - 2017/04/12)
Symposium (Member of the Organising Committee)
 Universidade de Aveiro CICECO, Portugal
2015/04/14 - 2015/04/15 The associate laboratory meeting Jornadas CICECO 2015 "NANOTECHNOLOGY - FROM THE LAB TO THE INDUSTRY" (2015/04/14 - 2015/04/15)
Meeting (Member of the Organising Committee)
 Universidade de Aveiro CICECO, Portugal
2015/03/30 - 2015/04/02 MP1308 COST action TO-BE "TOWARDS OXIDE BASED ELECTRONICS" 2015 Spring Meeting (2015/03/30 - 2015/04/02)
Meeting (Member of the Organising Committee)
 Universidade de Aveiro CICECO, Portugal

Event participation

Activity description
Type of event 		Event name
Institution / Organization
2019/10/30 - 2019/10/30 Piezoelectric energy harvesting device general public demonstration
Exhibition
 "Academia ao Serviço da Comunidade: novas oportunidades de cooperação e financiamento" within the integra@tec project
Universidade de Aveiro, Portugal
2019/10/11 - 2019/10/11 Piezoelectric energy harvesting device general public demonstration
Exhibition
 TechDays 2019
2009/06/15 - 2009/06/15 Electron Microscopy Seminar Participation
Seminar
 Joint Seminar on Electron Microscopy of Materials
Universidade de Aveiro CICECO, Portugal
2008/10/08 - 2008/10/08 Materials Characterisation Seminar Participation
Seminar
 Porosimetry, Surface Area and Materials Density - a Technical Approach
Universidade de Aveiro Departamento de Engenharia de Materiais e Cerâmica, Portugal
2008/07/06 - 2008/07/11 Lecture “Dielectric characterization of Y-doped strontium titanate ceramics” presentation
Meeting
 FAME Summer School on Inorganic Functional Materials
2007/10/17 - 2007/10/17 Electron Microscopy Workshop Participation
Workshop
 Advanced Analytical Scanning Electron Microscopy Workshop
Universidade de Aveiro, Portugal
2007/01/14 - 2007/01/21 Lecture “Effect of dopants on the improper ferroelastic phase transition in SrTiO3” presentation
Meeting
 FAME First Winter School of the WP5 New architectures for passive electronics
2006/10/01 - 2006/10/06 Lectures on hybrid and advanced multifunctional materials listening
Meeting
 FAME Second Joint Summer School on Biomedical Use of Hybrids and Advanced Multifunctional Materials for Optics, Sensing and Actuating
2005/09/30 - 2005/10/01 ‘Multi-scale modelling and characterisation for phase transformations in advanced materials’ meeting attending
Meeting
 MULTIMAT Marie Curie research training network meeting
Universitat de Barcelona, Spain
2005/06/06 - 2005/06/10 Lectures on ceramics processing and grain-boundary engineering listening
Meeting
 COST 525 Training School on Grain-Boundary Related Phenomena in Ceramic Materials: From Micro- to Nano-scale Dimensions
Università degli Studi di Genova, Italy
2001/10/22 - 2001/10/24 COST "Advanced Electroceramics: Grain Boundary Engineering" meeting attending
Meeting
 European Cooperation in Science and Technology COST 525 meeting
Universidade de Aveiro, Portugal

Jury of academic degree

Topic
Role 		Candidate name (Type of degree)
Institution / Organization
2017/12 Strain Effect on the Properties of K0.5Na0.5NbO3 Films
Supervisor
 Andre Santos (Master)
Universidade de Aveiro, Portugal

Association member

Society Organization name Role
2020/04/28 - Current Association of IFFS (Institute of Fundamental and Frontier Sciences)
2017/01 - Current European Ceramic Society

Conference scientific committee

Conference name Conference host
2023/11/20 - 2023/11/24 International Conference on Nanotechnology Research and Innovation (ICNTRI-2023) Aveiro (Online)
2016/06/01 - 2016/06/03 6th International Advances in Applied Physics and Materials Science Congress & Exhibition APMAS 2016 Istanbul, Turkey

Evaluation committee

Activity description
Role 		Institution / Organization Funding entity
2022 - Current German Research Foundation (DFG) Proposal Evaluation
Evaluator
 Deutsche Forschungsgemeinschaft, Germany Deutsche Forschungsgemeinschaft

Journal scientific committee

Journal title (ISSN) Publisher
2021/08/12 - Current Frontiers in Electronic Materials (2673-9895) Frontiers Media SA
2021/06/17 - Current Materials (1996-1944) MDPI AG
2020/02 - Current Coatings (2079-6412) MDPI AG
2019 - Current Nanomaterials Science & Engineering (2184-7002) PROA-UA
2020/02 - 2023/05 Nanomaterials (Special Issue) (2079-4991) MDPI AG
2018 - 2020 International Journal of Materials Science and Applications (2327-2635) Science Publishing Group
2012 - 2014 Dataset Papers in Physics: Condensed Matter Physics (2090-9314) Hindawi

Mentoring / Tutoring

Topic Student name
2023/10 - Current Electrical measurements Dayana Guzman Sierra
2023/09 - Current Electrical measurements Joao Miranda
2023/05 - Current Electro-mechanical measurements Luis Pinto
2019/11 - Current Characterization of polar dielectric ceramics Camila Ribeiro
2019/03 - Current Preparation and characterization of piezoelectric nanoceramics Fernando Sá
2023/10 - 2023/12 Piezoelectric Energy Harvesters Bruna Araujo, Gustavo Marieiro, Marcio Guedes
2023/10 - 2023/12 Hafnia Based Ferroelectrics Mariana Rodrigues
2023/03 - 2023/07 Electrical measurements Beatriz Almeida
2022/12/13 - 2023/01/06 LEDs and OLEDs Carolina Pinto, Carolina Direito, Eduarda Barreto
2017/02 - 2023/01 Characterization of polar dielectrics Rui Pinho
2018/12 - 2022/09 Characterization of tunable ferroelectric materials Patricia Bouça
2022/06 - 2022/07 Ferroelectric characterisation of alternatively sintered piezoelectric ceramics Anna Wlódarkiewicz
2021/12/19 - 2022/02/01 Eletronic Textiles Ariana Fernandes, Inês Dionísio, Inês Lopes, Rute Martins
2021/12/21 - 2022/01/31 Perovskite Solar Cells Joana Zúquete, Margarida Oliveira, Alexandra Santos
2021/06/01 - 2021/06/30 Li batteries João Correia, Amétrico Cruz, Tomás Vieira
2021/06/01 - 2021/06/30 Thermoelectrics João Miranda, Martinho Lima, Bernardo Vidal
2020/03 - 2021/05 Electrical characterization analysis of piezoelectric ceramics Ricardo Serrazina
2019/02 - 2019/06 Dielectric spectroscopy characterisation of composite materials Antonio Braz
2009/02 - 2009/06 Li-doped Potassium Tantalate Ceramics Characterisation Andre Espinha
2006/02 - 2006/06 Cu-doped Barium Strontium Titanate Ceramics Preparation and Characterisation Sebastian Zlotnik
2005/02 - 2005/06 Ca-doped Strontium Titanate Ceramics Preparation and Characterisation Branca Araujo

Other jury / evaluation

Activity description Institution / Organization
2018/07 - 2018/10 CDL-CTTRI-88-ARH / 2018 - International competition for recruitment of contracted post-docs under the Labor Code 150 in the University of Aveiro Universidade de Aveiro, Portugal
Distinctions

Award

2022 Co-supervisor of the Master thesis, which won the 5th Edition of Faria Frasco Award for the best Master Thesis in 2022 by Portuguese Society of Ceramics and Glass (SPCV)
Sociedade Portuguesa de Cerâmica e Vidro, Portugal
2022 CICECO - Aveiro institute of materials internal grant award
Universidade de Aveiro CICECO, Portugal
2019 First prize of the poster contest at Electric Field Enhanced Processing of Advanced Materials II - ECI Meeting
Engineering Conferences International, United States
2008 Best Poster of the symposium "Multiferroic and magnetoelectric materials" of E-MRS 2008 Spring Meeting
European Materials Research Society, France

Title

2013 Assistant Researcher (Investigador Auxiliar), IF/00602/2013, FCT Investigador 2013 program position
Fundação para a Ciência e a Tecnologia, Portugal

Other distinction

2023 MDPI - Guest Editor travel grant award
Multidisciplinary Digital Publishing Institute AG, Switzerland
2022 Feature paper publication in C - Journal of Carbon Research MDPI open access journal
Multidisciplinary Digital Publishing Institute AG, Switzerland
2021 Publication highlight as the editor's choice article in Nanomaterials MDPI open access journal
Multidisciplinary Digital Publishing Institute AG, Switzerland
2021 Selected publication reproduction in book "100 Years of Ferroelectricity 1921 - 2021"
World Scientific Publishing Co Pte Ltd, Singapore
2021 Selected review publication reproduction in book "100 Years of Ferroelectricity 1921 - 2021"
World Scientific Publishing Co Pte Ltd, Singapore
2018 Publication highlight in the themed collection: 2018 Journal of Materials Chemistry C HOT Papers
Royal Society of Chemistry, United Kingdom
2018 Feature paper publication in Coatings MDPI open access journal by personal invitation
Multidisciplinary Digital Publishing Institute AG, Switzerland
2018 Book editorship by personal invitation
Nova Science Publishers, United States
2017 Publication highlight as the feature article in Journal of the European Ceramic Society
Elsevier Ltd, United Kingdom
2015 Publication highlight in Nature Physics News&Views "Back to basics" by Hiroto Adachi
Springer Nature, Luxembourg