Maria Cristina Castro Freitas (BC12-319B-037F)

Curriculum Vitae

Maria Cristina Castro Freitas

Maria Freitas has been a contracted researcher (CEECind, since 2023) at the Associated Laboratory for Green Chemistry (REQUIMTE/LAQV) and an invited professor in the Biosensors Unit at Instituto Superior de Engenharia do Porto (ISEP). Her research is focused on the development of biosensors with strategic applications of nanomaterials, with emphasis on Medical Engineering (non-communicable disease diagnosis; cancer) and Food and Environmental Analysis (allergens; pathogenic bacteria; GMOs; contaminants). She received her PhD from the University of Porto (FCUP, 2020), master in Quality Control (FFUP, 2012) and graduated in Biochemistry (UTAD, 2010). During her scientific path Maria integrated an international Bilateral Cooperation Project at the University of Oviedo (UNIOVI, Spain) and a Marie-Curie fellow through an International Research Staff Exchange Scheme (IRSES-FP7), at Nanomedicine and Nanotoxicology Group in the Physics Institute, University of São Paulo (USP, Brazil). She was a Research Fellow in a highly competitive international project (ERA-NET Cofund) at Polytechnic of Porto - School of Engineering (ISEP), and a responsible Researcher of an IC&DT FCT-funded project (TracAllerSens). The know-how in nanomaterials along with its characterization and rapid target analyte detection through biosensing approaches led Maria Freitas to successful work in the field of medical engineering (development of biosensors for the analysis of biomarkers and tumour cells), and in the food analysis (simultaneous and multiplex detection). Other than the highly specific applications in immunosensing approaches (protein analysis), she was involved in the development of genosensors (DNA analysis) and Molecularly imprinted polymers (MIP-sensor). Importantly, the quality and impact of her work have gained significant attention from society and the scientific community. Maria supervised Research Fellows (2), MSc (6), and BsC (2) students, mentored (inter)national PhD (6) students, and collaborated with ongoing R&D projects. Overall, Maria Freitas was involved in competitive (inter)national projects, publishing 30 scientific papers and 2 book chapters. In 2023 Maria was honored with the Prize "Young Researcher" by the Portuguese Electrochemical Society (SPE) and in the last decade received 7 awards (Merit Award for Scientific Publication, IPP). As a young researcher and because of her qualification and proficiency, the published work has been cited >1000, giving rise to an H-index=17 (Scopus ID), 7 awards and 1 prize.

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Identification

Personal identification

Full name: Maria Cristina Castro Freitas

Author identifiers

Ciência ID: BC12-319B-037F
ORCID iD: 0000-0002-0628-2753
Researcher Id: L-1529-2014
Scopus Author Id: 57362519400

Knowledge fields

Engineering and Technology - Materials Engineering
Engineering and Technology - Medical Engineering

Languages

Language	Speaking	Reading	Writing	Listening
English	Advanced (C1)	Advanced (C1)	Advanced (C1)	Advanced (C1)
Portuguese	Proficiency (C2)	Proficiency (C2)	Proficiency (C2)	Proficiency (C2)
Spanish; Castilian	Advanced (C1)	Advanced (C1)	Advanced (C1)	Advanced (C1)
French	Beginner (A1)	Beginner (A1)	Beginner (A1)	Beginner (A1)

Education

	Degree	Classification
2016 - 2020 Concluded	Sustainable Chemistry (Doctorate) Major in Medical Engineering Universidade do Porto Faculdade de Ciências, Portugal "Development of electrochemical immunosensors and immunoassays for breast cancer biomarker analysis" (THESIS/DISSERTATION)	Unanimously approved
2016 Concluded	Cell Culture Basics Training (Doctoral Degree (completion of coursework)) Instituto Português de Oncologia do Porto Francisco Gentil Centro de Investigação, Portugal
2016 Concluded	Cancer Epigenetics (Doctoral Degree (completion of coursework)) Instituto Português de Oncologia do Porto Francisco Gentil EPE, Portugal
2014 Concluded	HACCP (Hazard Analysis and Critical Control Point) (Postgraduate Program) Major in Vocational Training Courses Quality Management Systems Consultores, Lda (QMSC), Portugal
2010 - 2012 Concluded	Quality Control (Master's Degree) Universidade do Porto Faculdade de Farmácia, Portugal "Electrochemical magnetic immunosensor for Salmonella typhimurium detection in milk samples" (THESIS/DISSERTATION)	17/20
2007 - 2010 Concluded	Biochemistry (Licenciate Degree) Universidade de Trás-os-Montes e Alto Douro, Portugal "Síntese e avaliação de corantes esquarílicos como sondas fluorescentes para proteínas" (THESIS/DISSERTATION)	14/20

Affiliation

Science

	Category Host institution	Employer
2023 - Current	Contracted Researcher (Research)	Fundação para a Ciência e a Tecnologia, Portugal
	LAQV - Laboratório Associado para a Química Verde/ REQUIMTE – Rede de Química e Tecnologia, Portugal
2020/07 - 2022	Contracted Researcher (Research)	Fundação para a Ciência e a Tecnologia, Portugal
	REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Portugal

Teaching in Higher Education

	Category Host institution	Employer
2025 - 2026	Invited Adjunct Teacher (Polytechnic Teacher)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal

2016 - 2024	Tutor (Polytechnic Teacher)	REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Portugal
	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal

Others

	Category Host institution	Employer
2020/01 - 2020/06	Researcher ERA-NET under Horizon 2020 (Grant attributed by ERA-NET Cofund: JPI/0007/2016. Supervisor: Professor Cristina Delerue-Matos)	REQUIMTE LAQV Porto, Portugal

2016 - 2020	PhD student (PhD fellowship attributed by FCT: SFRH/BD/111942/2015)	REQUIMTE/LAQV, Faculty of Sciences, University of Porto, Portugal
	REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Portugal
2014/03 - 2015/03	Researcher (Grant attributed by European Commission, Research & Innovation, Marie Curie Actions, FP7-PEOPLE-2013-IRSES \| 612545. Supervisor: Professor Valtencir Zucolotto)	University of São Paulo, Brazil
	Nanomedicine and Nanotoxicology Group, Physics Institute, University of São Paulo, Brazil
2013/09 - 2013/12	Visiting Researcher (Grant attributed by the European (bilateral) project: Ações Integradas Luso - Espanholas / 2012 \| Ação Nº E-38/12. Supervisor: Professor María Jesús Lobo-Castañón)	Universidad de Oviedo, Spain
	Departamento de Química Física y Analítica, Universidad de Oviedo, Spain, Spain
2012/10 - 2012/12	Visiting Researcher (Grant attributed by the European (bilateral) project: Ações Integradas Luso - Espanholas / 2012 \| Ação Nº E-38/12. Supervisor: Professor María Jesús Lobo-Castañón)	Universidad de Oviedo, Spain
	Departamento de Química Física y Analítica, Universidad de Oviedo, Spain, Spain
2011 - 2012	Master Student (Supervisor: Dr. Subramanian Viswanathan)	REQUIMTE/LAQV - Faculty of Pharmacy, University of Porto,, Portugal

Projects

Grant

	Designation	Funders
2022/09 - 2022/09	REQUIMTE_2022 (Verão com Ciência, no LAQV/REQUIMTE) REQUIMTE_VC_01_2022 Supervisor LAQV - Laboratório Associado para a Química Verde/ REQUIMTE – Rede de Química e Tecnologia, Portugal	Concluded
2020/01/01 - 2020/06/30	REWATER - Sustainable and safe water management in agriculture: Increasing the efficiency of water reuse for crop growth while protecting ecosystems, services and citizens welfare WaterJPI/0007/2016 Researcher European Commision (ERA-NET Cofund / Horizon 2020), Belgium	European Commission (ERA-NET under Horizon 2020) Concluded
2016/01/01 - 2019/12/31	High-performance magnetic nanoparticle-based immunoassays for breast cancer biomarker analysis SFRH/BD/111942/2015 PhD Student Fellow	Fundação para a Ciência e a Tecnologia Concluded
2014/03 - 2015/03	GMOsensor - Monitoring GMOs by Innovative Biosensor Approaches FP7-PEOPLE-2013-IRSES \| 612545 Researcher European Commission, Research & Innovation, Marie Curie Actions, Belgium	European Commission, Research & Innovation, Marie Curie Actions Concluded
2012/09 - 2013/12	Development of electrochemical and optical genosensors for the detection of transgenic foods Bilateral Project (Portugal/Spain) / 2012 \| Action Nº E-38/12 Researcher	Conselho de Reitores das Universidades Portuguesas (CRUP) Concluded

Contract

	Designation	Funders
2025/01/01 - Current	Associated Laboratory for Green Chemistry - Clean Technologies and Processes (UID/50006/2025) UID/50006/2025 10.54499/UID/50006/2025 Rede de Química e Tecnologia Laboratório Associado para a Química Verde, Portugal Universidade do Porto Instituto de Ciências Tecnologias e Agroambiente, Portugal Universidade de Coimbra, Portugal Instituto Politécnico do Porto, Portugal Universidade Nova de Lisboa, Portugal Universidade de Aveiro, Portugal Universidade Nova de Lisboa Associação para a Inovação e Desenvolvimento da FCT, Portugal	Fundação para a Ciência e a Tecnologia Ongoing
2025/01/01 - 2027/12/31	Avanços na Análise de Alergénios: Melhorar a Segurança Alimentar com Dispositivos Eletroquímicos baseados em Papel 2023.16484.ICDT 10.54499/2023.16484.ICDT Researcher Rede de Química e Tecnologia Laboratório Associado para a Química Verde, Portugal	Fundação para a Ciência e a Tecnologia Ongoing
2021/01/01 - 2025/12/31	Associated Laboratory for Green Chemistry - Clean Technologies and Processes LA/P/0008/2020 10.54499/LA/P/0008/2020 UID/QUI/50006/2019 Universidade do Porto Faculdade de Ciências, Portugal Rede de Química e Tecnologia Laboratório Associado para a Química Verde, Portugal Universidade Nova de Lisboa, Portugal Universidade do Porto Instituto de Ciências Tecnologias e Agroambiente, Portugal Universidade de Aveiro, Portugal Universidade de Évora, Portugal Unidade de Investigação Vidro e Cerâmica para as Artes, Portugal Universidade de Lisboa Instituto Dom Luiz, Portugal Universidade Nova de Lisboa Associação para a Inovação e Desenvolvimento da FCT, Portugal	Fundação para a Ciência e a Tecnologia Ongoing
2020/07 - 2022	TracAllerSens-Electrochemical sensors for the detection and quantification of trace amounts of allergens in food products PTDC/QUI-QAN/30735/2017 Post-doc REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Portugal	Fundação para a Ciência e a Tecnologia Concluded
2021/09 - 2021/09/24	REQUIMTE_2021 (Verão com Ciência, no LAQV/REQUIMTE) REQUIMTE_VC_01_2021 Supervisor LAQV - Laboratório Associado para a Química Verde/ REQUIMTE – Rede de Química e Tecnologia, Portugal	Fundação para a Ciência e a Tecnologia Concluded
2018/07/02 - 2019/07/06	And now what do we do with the waste from the chemistry labs? 3966 Researcher Instituto Politécnico do Porto Grupo de Reação e Análises Químicas, Portugal	Ciência Viva Concluded
2017/07/10 - 2018/07/14	A journey through the Chemical Analysis laboratories 3488 Researcher Instituto Politécnico do Porto Grupo de Reação e Análises Químicas, Portugal	Ciência Viva Concluded
2018/07/09 - 2018/07/13	Uma viagem pelos laboratórios de análise química ID: 3833 REQUIMTE LAQV Porto, Portugal	Ciência Viva Concluded
2017/06/26 - 2018/06/30	Sensors: health, environment and food 3997 Researcher Instituto Politécnico do Porto Grupo de Reação e Análises Químicas, Portugal	Ciência Viva Concluded
2017/07/10 - 2017/07/14	E agora o que fazemos aos resíduos dos laboratórios de química? ID: 3966 Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal	Ciência Viva Concluded
2013 - 2015	GMOsensor - Monitoring Genetically Modified Organisms in Food and Feed by Innovative Biosensor Approaches 612545 Researcher Universidade de São Paulo Instituto de Física, Brazil	European Commission Seventh Framework Programme for Research and Technological Development Concluded
2013/01/01 - 2014/12/31	Projecto Estratégico - LA 6 - 2013-2014 PEst-C/EQB/LA0006/2013 Universidade Nova de Lisboa Faculdade de Ciências e Tecnologia, Portugal Universidade do Porto Instituto de Ciências Tecnologias e Agroambiente, Portugal Rede de Química e Tecnologia Laboratório Associado para a Química Verde, Portugal	Fundação para a Ciência e a Tecnologia Concluded
2012 - 2013	Development of electrochemical and optical genosensors for the detection of transgenic foods Ações Integradas Luso – Espanholas / 2012 \| Ação Nº E-38/12 Researcher Universidade do Porto Instituto de Ciências e Tecnologias Agrárias e Agro-Alimentares, Portugal	Conselho de Reitores das Universidades Portuguesas (CRUP) Concluded
2011/01/01 - 2012/12/31	Projecto Estratégico - LA 6 - 2011-2012 PEst-C/EQB/LA0006/2011 Universidade Nova de Lisboa Faculdade de Ciências e Tecnologia, Portugal Universidade do Porto Instituto de Ciências Tecnologias e Agroambiente, Portugal Rede de Química e Tecnologia Laboratório Associado para a Química Verde, Portugal	Fundação para a Ciência e a Tecnologia Concluded

Other

	Designation	Funders
2023 - Current	Broad-dynamic biosensor array for multiplex analysis: tackling a non-communicable disease diagnosis through a sustainable paper-based analytical approach 2022.00490.CEECIND Researcher LAQV - Laboratório Associado para a Química Verde/ REQUIMTE – Rede de Química e Tecnologia, Portugal	Fundação para a Ciência e a Tecnologia Ongoing
2019/01/01 - 2019/12/31	Laboratório Associado para a Química Verde - Tecnologias e Processos Limpos UID/QUI/50006/2019 LA/P/0008/2020 10.54499/LA/P/0008/2020 Universidade do Porto Faculdade de Ciências, Portugal Rede de Química e Tecnologia Laboratório Associado para a Química Verde, Portugal Universidade Nova de Lisboa, Portugal Universidade do Porto Instituto de Ciências Tecnologias e Agroambiente, Portugal Universidade de Aveiro, Portugal Universidade de Évora, Portugal Unidade de Investigação Vidro e Cerâmica para as Artes, Portugal Universidade de Lisboa Instituto Dom Luiz, Portugal Universidade Nova de Lisboa Associação para a Inovação e Desenvolvimento da FCT, Portugal	Fundação para a Ciência e a Tecnologia Concluded

Outputs

Publications

Book chapter	Rocha, José Pedro and Torre, Ricarda and Castro-Freitas, Maria and Costa-Rama, Estefanía and Nouws, Henri P. A. and Dele; Regan, Fiona and Hansen, Peter-Diedrich and Barceló, Damià. "Electrochemical (Bio)sensors for Toxins Control in the Marine Environment". 2023. 10.1007/698_2022_947 Gomes, F.; Freitas, M.; Nouws, H.; Morais, S.; Delerue-Matos, C.. "Graphene as a Material for Bioelectrochemistry". In Encyclopedia of Interfacial Chemistry, 235-240. Elsevier, 2018. Published • 10.1016/b978-0-12-409547-2.13519-x
Conference abstract	Fernandes, Filipe; Freitas, Maria; Pinho, Cláudia; Oliveira, Ana Isabel; delerue-matos, C; Grosso, Clara. "Eco-Friendly Synthesis of Nanoscale Zero-Valent Iron For Water Contaminant Removal (Oral communication)". Paper presented in RETASTE: Rethink Food Resources, Losses, and Waste 6th International Conference, Athens, 2025. Published Shayesteh Bazsefidpar; Freitas, Maria; Clara Pereira; Gemma Gutierrez; Esther Serrano; María Matos; Delerue-Matos, Crstina; María Del Carmen Blanco-López. "Core/shell magnetic-gold nanoparticles for the rapid analysis of E. coli O157:H7 through an electrochemical immunoassay". Paper presented in . Break Biofilms Conference, Viena, 2023. Published Torre, Ricarda; Freitas, Maria; Costa-Rama, Estefanía; Nouws, Henri P.A.; Delerue-Matos, Crstina. "Tropomyosin analysis by a label-free electrochemical immunosensor". Paper presented in 5th Meeting of Medicinal Biotechnology (5MBtM) and 2nd Iberian Congress on Medicinal Biotechnology, 2022. Published Freitas, Maria; del Rio, Mariana; André Carvalho; Catarina Oliveira; Duarte Guimarães; Ricarda Torre; Pedro Rocha; et al. "Electrochemical immunosensors for food allergen analysis". Paper presented in 3rd edition of Food Science and Nutrition Technology, 2022. Published Neves, Marta M. P. S.; Freitas, Maria; Nouws, Henri P.A.; delerue-matos, C. "Oral communication " Dual Electrochemical Immunosensor For The Simultaneous Analysis of Two Peanut Allergens"". Paper presented in Analítica 2020, 10º Encontro da Divisão de Química Analítica, 2020. Published Cruz Fernandes, Virgínia; Freitas, Maria; Domingues, Valentina Fernandes; delerue-matos, C. "Oral communication "Evaluation of the QuEChERS and magnetic micro dispersive solid-phase extraction of brominated flame retardants in red fruits with determination by GC/MS"". Paper presented in 11th National Chromatography Meeting, Caparica, 2019. Published Freitas, Maria; Nouws, H.P.A.; delerue-matos, C. "oral communication "Non-invasive analysis of the Breast Cancer Biomarker HER2-ECD through Electrochemical Biosensing Strategies"". Paper presented in II Meeting of Medicinal Biotechnology I Iberian Congress on Medicinal Biotechnology, Porto, 2018. Published Freitas, Maria. "Oral communication "Synthesis and functionalization of Fe3O4@Au core-shell nanoparticles for the electrochemical detection of maize MON810"". Paper presented in 15th international conference on electroanalysis : ESEAC 2014, Malmo¨, 2014. Published • 10.1002/elan.201480031 Freitas, Maria; Nouws, H.P.A.; M. Beatriz P.P. Oliveira; delerue-matos, C. "Oral communication "Iron Oxide/Gold core/Shell nanoparticles and screen-printed carbon electrode for sensitive detection of Salmonella typhimurium"". Paper presented in Maria Castro Freitas, Porto, 2012. Published
Conference paper	Torre, Ricarda; Freitas, Maria; Costa-Rama, Estefanía; Nouws, Henri P. A.; Delerue-Matos, Cristina. "Tropomyosin Analysis in Foods Using an Electrochemical Immunosensing Approach". 2021. Published • 10.3390/csac2021-10471 Carvalho, André; Freitas, Maria; Nouws, Henri P. A.; Delerue-Matos, Cristina. "A Voltammetric Nanodiamond-Coated Screen-Printed Immunosensor for The Determination of a Peanut Allergen in Commercial Food Products". 2021. Published • 10.3390/csac2021-10458 Freitas, Maria; Nouws, Henri P. A.; Delerue-Matos, Cristina. "Nano- and Micro Material-Based Electrochemical Bioassays for the Non-Invasive Detection of HER2-ECD, a Breast Cancer Biomarker". 2019. Published • 10.3390/proceedings2019015020 Virgínia Cruz Fernandes; José Maria Oliveira; João Pacheco; Maria Castro Freitas; Valentina F. Domingues; Crstina Delerue-Matos. Corresponding author: Virgínia Cruz Fernandes. "Analysis of organophosphorus pesticide residues in fruits extracted by QuEChERS and gas chromatography with nitrogen phosphorus detection". Paper presented in ICFC 2017 - International Conference on Food Contaminants, Braga, 2017. Published
Conference poster	Freitas, Maria; delerue-matos, C; Nouws, H.P.A.. "Magnetic Electrochemical Immunoassay for Crustacean Allergen Analysis". Paper presented in Encontro Investigação Jovem da Universidade do Porto (IJUP), 2026. .; Freitas, Maria; delerue-matos, C; Nouws, H.P.A.. "Simultaneous electrochemical analysis of fish and crustacean allergens". Paper presented in XXVI Meeting of the Portuguese Electrochemical Society, 2025. Freitas, Maria; delerue-matos, C; Nouws, H.P.A.. "Electrochemical Biosensor for Cystatin C: A Step Forward in Kidney Function Monitoring". Paper presented in 7th Meeting of Medicinal Biotechnology and 3nd Iberian Congress on Medicinal Biotechnology, 2025. Sousa, Gabriel; delerue-matos, C; Rodrigues, Francisca; Freitas, Maria; Marta Oliveira. "Characterization of fine and ultrafine particulate matter released during structure and forest fires.". Paper presented in 9PyChem, 2025. Fernandes, Filipe; Freitas, Maria; Pinho, Cláudia; Oliveira, Ana Isabel; delerue-matos, C; Grosso, Clara. "Eco-Friendly Synthesis, Characterization and Cytotoxicity of Zero-Valent Iron Nanoparticles from Spent Coffee Grounds". 2025. Martinho, Sílvia D.; Rafaella D. Muscalu; Freitas, Maria; Virgínia Cruz Fernandes; Sónia A. Figueiredo; Delerue-Matos, Cristina. "Assessing the ecotoxicity effects of magnetic nanoparticles applied for microplastic removal". Paper presented in XXVIII Galician-Portuguese International Conference on Chemistry, 2024. Sílvia D. Martinho; Freitas, Maria; Virgínia Cruz Fernandes; Sónia A. Figueiredo; Cristina Delerue-Matos. "Application of iron magnetic nanoparticles for microplastic removal from water". Paper presented in Winter School on Contaminants of Emerging Concern and Disinfection By-Products, 2024. Pedro Rocha; Freitas, Maria; del Rio, Mariana; Geraldo, Dulce; Fátima Bento; José Manuel Leão; Nouws, Henri P.A.; Delerue-Matos, Crstina. "Fish allergen analysis in commercial products: electrochemical biosensor development". Paper presented in 5th Meeting of Medicinal Biotechnology (5MBtM) and 2nd Iberian Congress on Medicinal Biotechnology, 2022. Catarina Oliveira; Joana S. Teixeira; Maria Castro Freitas; Clara Pereira; Nouws, Henri P.A.; Cristina Delerue-Matos. "Magnetic electrochemical immunosensing to track a major celery allergen in foods". Paper presented in 5th Meeting of Medicinal Biotechnology (5MBtM) and 2nd Iberian Congress on Medicinal Biotechnology, 2022. Mariana del Rio; Freitas, Maria; Nouws, Henri P.A.; Cristina Delerue-Matos. "A fast amperometric immunosensor for egg allergen analysis in foodstuff". Paper presented in 5th Meeting of Medicinal Biotechnology (5MBtM) and 2nd Iberian Congress on Medicinal Biotechnology, 2022. Pedro Rocha; Freitas, Maria; Geraldo, Dulce; Fátima Bento; Nouws, Henri P.A.; Delerue-Matos, Crstina. "A sandwich-type electrochemical immunosensor for tetrodotoxin analysis". Paper presented in VI Encontro em Técnicas de Caracterização e Análise Química (VI ETCAQ), 2022. Freitas, Maria; Nouws, Henri P.A.; delerue-matos, C. "Tracking peanut traces in food products - quantum dots as electroactive labels in a voltammetric immunoassay for the peanut allergen Ara h 1". Paper presented in Biosensors 2021 - 31st Anniversary World Congress on Biosensors \| Online, 2021. Carvalho, André; Freitas, Maria; Nouws, Henri P.A.; delerue-matos, C. "Voltammetric Nanodiamond-Coated Screen-Printed Immunosensor for The Determination of a Peanut Allergen in Commercial Food Products". Paper presented in The 1st International Electronic Conference on Chemical Sensors and Analytical Chemistry \| Online, 2021. Torre, Ricarda; Freitas, Maria; Costa-Rama, Estefanía; Nouws, Henri P.A.; delerue-matos, C. "Tropomyosin Analysis in Foods Using An Electrochemical Immunosensing Approach". Paper presented in The 1st International Electronic Conference on Chemical Sensors and Analytical Chemistry \| Online, 2021. Freitas, Maria; Nouws, H.P.A.; delerue-matos, C. "Nano- and micro material-based electrochemical bioassays for the non-invasive electrochemical detection of HER2-ECD, a breast cancer biomarker". Paper presented in 7th International Symposium on Sensor Science, Napoli, Italy, 2019. Freitas, Maria; Henri P.A. Nouws; delerue-matos, C. "Electrochemical detection of HER2-ECD breast cancer biomarker using quantum dots as nanolabels". Paper presented in IX Nyna, International congress on analytical nanoscience and nanotechnology. Zaragoza, Spain, 2019. Virgínia Cruz Fernandes; Freitas, Maria; João P.G. Pacheco; Valentina F. Domingues; delerue-matos, C. "Magnetic nanoparticles used as QuEChERS sorbents for organophosphorus pesticides detection in strawberries". Paper presented in IX Nyna, International congress on analytical nanoscience and nanotechnology. Zaragoza, Spain, 2019. Maria Fernandes; Diana Rede; Freitas, Maria; Ana Silva; Bárbara Moreira; Cátia Silva; Dalton Sillos; et al. "Caracterização de solos florestais queimados". Paper presented in XXIV Encontro Luso-Galego de Química. Porto, Portugal. November 21-23, 2018. Virgínia C. Fernandes; Freitas, Maria; João Grosso Pacheco; Domingues, Valentina; delerue-matos, C. "Evaluation of a modified QuEChERS method for the extraction of brominated flame retardants from red fruits by GC-MS". Paper presented in 14º Encontro de Química dos Alimentos. Viana do Castelo, Portugal. November, 6-9, 2018, 2018. Diana Rede; Maria João Fernandes; Maria Castro Freitas; Ana Silva, Bárbara Moreira, Cátia Silva, Dalton Sillos, Daniela Tiago, João Costa, Márcia Carvalho, Maria João Pereira; Shahnoza Yusupova, Vasco Telo, Marta Oliveira, Nádia Silva; Paula Paíga; Virgínia Cruz Fernandes; Florinda Martins, Hendrikus Nouws, Manuela Carvalho, Maria João Ramalhosa, Teresa Oliva-Teles, Cristina Delerue-Matos. "Characterization of burnt forest soils". Paper presented in 24th Encontro Luso Galego de Química (ELGQ24), 2018. Freitas, Maria; Virgínia C. Fernandes; João Grosso Pacheco; José Maria Oliveira; Valentina F. Domingues; delerue-matos, C. "Organophosphorus pesticide residues in strawberry from different farming systems in Portugal: New analytical approach". Paper presented in ISEAC-40 International Conference on Environmental & Food Monitoring. Santiago de Compostela, Spain. June, 18-22, 2018. Virgínia C. Fernandes; Freitas, Maria; João Grosso Pacheco; Valentina F. Domingues; delerue-matos, C. "Evaluation of a modified QueChers method for the extraction of Brominated flame retardants from strawberries by GC-MS". Paper presented in ISEAC-40 International Conference on Environmental & Food Monitoring. Santiago de Compostela, Spain. June, 18-22, 2018. Freitas, Maria; Henri P.A. Nouws; delerue-matos, C. "Electrochemical immunosensing platforms for breast cancer detection". Paper presented in XXIII Meeting of the Portuguese Society of Electrochemistry. Porto, Portugal. May 2-4, 2018. Virgínia C. Fernandes; Freitas, Maria; José Maria Oliveira; João Grosso Pacheco; Valentina F. Domingues; delerue-matos, C. "Determination of organophosphorus pesticide in strawberries using modified QueChERS method with magnetic nanoparticles and GC-FPD". Paper presented in 10º Encontro Nacional de Cromatografia. Bragança, Portugal, 2017. João G. Pacheco; Patricia Rebelo; Freitas, Maria; Henri P.A. Nouws; delerue-matos, C. "Breast cancer biomarker (HER2-ECD) detection using a molecularly imprinted sensor". Paper presented in 2nd Workshop on Electrochemical Devices / 3rd Workshop ELECTROBIONET, Oviedo (Spain). November, 9-10, 2017. Freitas, Maria; Henri P.A. Nouws; delerue-matos, C. "Electrochemical immunosensor for detection of a Breast cancer biomarker based on distinct carbon- and gold- based nanomaterial-modified sensing platform". Paper presented in 2nd Workshop on Electrochemical Devices / 3rd Workshop ELECTROBIONET, Oviedo (Spain). November, 9-10, 2017, 2017. Virgínia C. Fernandes; Freitas, Maria; José Maria Oliveira; João Grosso Pacheco; Valentina F. Domingues; delerue-matos, C. "Analysis of organophosphorus pesticide residues in fruits extraxted by QueChERS and gas chromatography with nitrogen phosphorus detection". Paper presented in ICFC 2017; International Conference on Food Contaminants. Braga, Portugal. July, 13-14, 2017. João P.G. Pacheco; Marta S.V. Silva; Freitas, Maria; Henri P.A. Nouws; delerue-matos, C. "Molecularly imprinted electrochemical sensor for the point-of-care detection of a breast cancer biomarker (CA 15-3)". Paper presented in The 9th International Conference on Molecular Imprinting. Lund, Sweden. June, 26-30, 2016, 2016. 10.1016/j.snb.2017.10.027 João P.G. Pacheco; Marta S.V. Silva; Freitas, Maria; Henri P.A. Nouws; delerue-matos, C. "Breast cancer biomarker analysis using a molecularly imprinted polymer sensor". Paper presented in 2nd ASPIC International Congress, IPO. Porto, Portugal. April, 28-29, 2016. Freitas, Maria; M. Fátima Barroso; Clara Pereira; Cristina Freire; Noemi de-los-Santos-Álvarez; Arturo J. Miranda-Ordieres; María Jesús Lobo-Castañón; delerue-matos, C. "Synthesis and functionalization of Fe3O4@Au core-shell nanoparticles for the electrochemical detection of maize MON810". Paper presented in 15th International Conference on Electroanalysis - ESEAC 2014. Malmö, Sweden. June, 11-15, 2014. Freitas, Maria; Subramanian Viswanathan; Henri P.A. Nouws; M. Beatriz P.P. Oliveira; delerue-matos, C. "Label-free electrochemical immunosensor for Salmonella typhimurium determination using iron/gold core/shell magnetic nanoparticles". Paper presented in VI Workshop on Analytical Nanoscience and Nanotechnology. Alcalá de Henares, Spain. July, 2013. Freitas, Maria; M. Fátima Barroso; Sónia Amaya-González; Noemi de-los Santos Álvarez; Arturo J. Miranda-Ordieres; M. Beatriz P.P. Oliveira; delerue-matos, C; María Jesús Lobo-Castañón. "Event-Specific Genosensors for maize MON810: A comparation of strategies using disposable screen-printed and 3D nanostructured Au electrodes". Paper presented in 3rd International Conference on Biosensing Technology. Sitges, Spain. May, 2013. Freitas, Maria; Sónia Amaya-González; M. Fátima Barroso; Noemi de-los-Santos-Álvarez; Arturo J. Miranda-Ordieres; M. Beatriz P.P. Oliveira; María Jesús Lobo-Castañón; delerue-matos, C. "Towards rapid and inexpensive detection of GMO specific events: Electrochemical genosensors on disposable Au electrodes". Paper presented in . XVIII Meeting of the Portuguese Electrochemical Society. Porto, Portugal. March, 25-27, 2013. M. Fátima Barroso; Freitas, Maria; Sónia Amaya-González; Subramanian Viswanathan; Noemi de-los-Santos-Álvarez; Arturo J. Miranda-Ordieres; M. Beatriz P.P. Oliveira; María Jesús Lobo-Castañón; delerue-matos, C. "Gold nanoarrays-based electrochemical genosensor for GMO control on food and feed". Paper presented in International Conference on Recent Advances in Textile and Electrochemical Sciences, Rates, India. March, 2013. Freitas, Maria; Subramanian Viswanathan; M. Beatriz P.P. Oliveira; delerue-matos, C. "Synthesis and characterization of functionalized Fe-Au/core-shell magnetic nanoparticles for bioassay applications". Paper presented in IJUP¿12 ¿ V Encontro de Jovens Investigadores da Universidade do Porto, Reitoria da Universidade do Porto, Porto, Portugal. February, 22-24, 2012. Freitas, Maria; Paulo Santos. "Benzoselenazole and 3,3-dimethylindolenine squarilium dyes as fluorescent probes for albumins detection". Paper presented in XVII Congresso Nacional de Bioquímica, Hotel Porto Palácio. Porto, Portugal. December, 15-17, 2010.
Journal article	Torrinha, Álvaro; Silva, Aires; Seguro, Isabel; Pacheco, João; Delerue-Matos, Cristina; Morais, Simone; Freitas, Maria. "Gold-printed paper-like substrate immunosensor for label-free trimethoprim determination in water and fish". Microchemical Journal 228 (2026): 119121. https://doi.org/10.1016/j.microc.2026.119121. Published • 10.1016/j.microc.2026.119121 Fernandes, Filipe; Paíga, Paula; Freitas, Maria; Pinho, Cláudia; Oliveira, Ana Isabel; Delerue-Matos, Cristina; Grosso, Clara. "Green zero-valent iron nanoparticles from Cistus ladanifer by-products for glyphosate remediation in water and soil". Bioresource Technology 450 (2026): 134400. https://doi.org/10.1016/j.biortech.2026.134400. Published • 10.1016/j.biortech.2026.134400 Sousa, Gabriel; Azevedo, Rui; Almeida, Agostinho; Morais, Simone; Delerue-Matos, Cristina; Wang, Xianyu; Rodrigues, Francisca; Freitas, Maria; Oliveira, Marta. "Morphological and elemental characterization of fine and ultrafine particulate matter generated from fires". Environmental Research 288 (2026): 123281. https://doi.org/10.1016/j.envres.2025.123281. Published • 10.1016/j.envres.2025.123281 Fernandes, Filipe; Freitas, Maria; Pinho, Cláudia; Oliveira, Ana Isabel; Delerue-Matos, Cristina; Grosso, Clara. "Upcycling Coffee Waste into Sustainable Nano Zerovalent Iron for Environmental Contaminant Remediation: Characterization, Applicability and Cytotoxicity". Nanomaterials 15 23 (2025): 1788. https://doi.org/10.3390/nano15231788. Published • 10.3390/nano15231788 Freitas, Maria; Dibo, Vitória; Ribeiro, Rita; Delerue-Matos, Cristina; Morais, Simone; Torrinha, Álvaro. "Development of a carbon paper-based electrochemical immunosensor for trimethoprim detection in fishery species: monitoring antibiotic contaminants". ADMET and DMPK (2025): 2962. https://doi.org/10.5599/admet.2962. Published • 10.5599/admet.2962 Rocha, José Pedro; Freitas, Maria; Geraldo, Dulce; Bento, Fátima; Delerue-Matos, Cristina; Nouws, Henri P. A.. Corresponding author: Freitas, Maria. "Electrochemical Magnetic Immunoassay for the Determination of the Fish Allergen ß-Parvalbumin". Biosensors 14 12 (2024): 639. https://doi.org/10.3390/bios14120639. Published • 10.3390/bios14120639 Torre, Ricarda; Freitas, Maria; Teixeira, Joana S.; Pereira, Clara R.; Costa-Rama, Estefanía; Delerue-Matos, Cristina; Nouws, Henri P.A.. "Assessment of a crustacean allergen in fishery products using a nanomodified label-free voltammetric immunosensing approach". Microchemical Journal 206 (2024): 111662. http://dx.doi.org/10.1016/j.microc.2024.111662. Published • 10.1016/j.microc.2024.111662 Torrinha, A.; Freitas, M.; Dibo, V.; Morais, S.. "Electrochemical immunosensors: Application to surveillance of contaminants of emerging concern in aquatic ecosystems". TrAC Trends in Analytical Chemistry 178 (2024): 117844. http://dx.doi.org/10.1016/j.trac.2024.117844. Published • 10.1016/j.trac.2024.117844 Teixeira, Joana S.; Freitas, Maria; Oliveira, Catarina; Pereira, Clara R.; Delerue-Matos, Cristina; Nouws, Henri P.A.. Corresponding author: Freitas, Maria. "Voltammetric immunosensor based on oxidized carbon nanotubes/MnFe2O4 hybrid nanoplatform for amplified detection of celery (Apium graveolens)". Food Chemistry (2024): 140733. http://dx.doi.org/10.1016/j.foodchem.2024.140733. Published • 10.1016/j.foodchem.2024.140733 Rocha, José Pedro; Freitas, Maria; Geraldo, Dulce; Delerue-Matos, Cristina; Nouws, Henri P.A.. Corresponding author: Freitas, Maria. "Seafood product safety: A hybrid graphene/gold-based electrochemical immunosensor for fish allergen analysis". Food Chemistry 446 (2024): 138889. http://dx.doi.org/10.1016/j.foodchem.2024.138889. Published • 10.1016/j.foodchem.2024.138889 Sousa, Gabriel; Teixeira, Joana; Azevedo, Rui; Almeida, Agostinho; Delerue-Matos, Cristina; Morais, Simone; Wang, Xianyu; et al. "Gravimetric, morphological, and chemical characterization of fine and ultrafine particulate matter inside fire stations". Building and Environment 255 (2024): 111403. http://dx.doi.org/10.1016/j.buildenv.2024.111403. Published • 10.1016/j.buildenv.2024.111403 Shayesteh Bazsefidpar; Maria Freitas; Clara R. Pereira; Gemma Gutiérrez; Esther Serrano-Pertierra; Henri P. A. Nouws; María Matos; Cristina Delerue-Matos; María Carmen Blanco-López. "Fe3O4@Au Core–Shell Magnetic Nanoparticles for the Rapid Analysis of E. coli O157:H7 in an Electrochemical Immunoassay". Biosensors (2023): https://doi.org/10.3390/bios13050567. Open access • Published • 10.3390/bios13050567 Freitas, Maria; del Rio, Mariana; Nouws, Henri P. A.; Delerue-Matos, Cristina. Corresponding author: Freitas, Maria. "Tracking a Major Egg Allergen to Assess Commercial Food Label Compliance: Towards a Simple and Fast Immunosensing Device". Biosensors 12 12 (2022): 1109. http://dx.doi.org/10.3390/bios12121109. Open access • Published • 10.3390/bios12121109 Torre, Ricarda; Freitas, Maria; Costa-Rama, Estefanía; Nouws, Henri P.A.; Delerue-Matos, Cristina. "Food allergen control: Tropomyosin analysis through electrochemical immunosensing". Food Chemistry 396 (2022): 133659. http://dx.doi.org/10.1016/j.foodchem.2022.133659. Open access • Published • 10.1016/j.foodchem.2022.133659 Freitas, Maria; Carvalho, André; Nouws, Henri P. A.; Delerue-Matos, Cristina. Corresponding author: Freitas, Maria. "Tracking Arachis hypogaea Allergen in Pre-Packaged Foodstuff: A Nanodiamond-Based Electrochemical Biosensing Approach". Biosensors 12 6 (2022): 429. http://dx.doi.org/10.3390/bios12060429. Open access • Published • 10.3390/bios12060429 Freitas, Maria; Nouws, Henri P. A.; Delerue-Matos, Cristina. "Voltammetric Immunosensor to Track a Major Peanut Allergen (Ara h 1) in Food Products Employing Quantum Dot Labels". Biosensors 11 11 (2021): 426. http://dx.doi.org/10.3390/bios11110426. Open access • Published • 10.3390/bios11110426 Freitas, Maria; Neves, Marta M. P. S.; Nouws, Henri P. A.; Delerue-Matos, Cristina. "Electrochemical Immunosensor for the Simultaneous Determination of Two Main Peanut Allergenic Proteins (Ara h 1 and Ara h 6) in Food Matrices". Foods 10 8 (2021): 1718. http://dx.doi.org/10.3390/foods10081718. Open access • Published • 10.3390/foods10081718 Freitas, Maria; Nouws, Henri P.A.; Keating, Elisa; Delerue-Matos, Cristina. "High-performance electrochemical immunomagnetic assay for breast cancer analysis". Sensors and Actuators B: Chemical 308 (2020): 127667. http://dx.doi.org/10.1016/j.snb.2020.127667. Published • 10.1016/j.snb.2020.127667 Cruz Fernandes, Virgínia; Freitas, Maria; Pacheco, João G.; Fernandes Domingues, Valentina; Delerue-Matos, Cristina. "Evaluation of the QuEChERS and magnetic micro dispersive solid-phase extraction of brominated flame retardants in red fruits with determination by GC/MS". Food Chemistry 309 (2020): 125572. http://dx.doi.org/10.1016/j.foodchem.2019.125572. Published • 10.1016/j.foodchem.2019.125572 Freitas, Maria; Nouws, Henri P. A.; Keating, Elisa; Fernandes, Virginia Cruz; Delerue-Matos, Cristina. "Immunomagnetic bead-based bioassay for the voltammetric analysis of the breast cancer biomarker HER2-ECD and tumour cells using quantum dots as detection labels". Microchimica Acta 187 3 (2020): http://dx.doi.org/10.1007/s00604-020-4156-4. Published • 10.1007/s00604-020-4156-4 Freitas, Maria; Neves, Marta M.P.S.; Nouws, Henri P.A.; Delerue-Matos, Cristina. "Quantum dots as nanolabels for breast cancer biomarker HER2-ECD analysis in human serum". Talanta 208 (2020): 120430. http://dx.doi.org/10.1016/j.talanta.2019.120430. Published • 10.1016/j.talanta.2019.120430 Freitas, Maria; Nouws, Henri P. A.; Delerue-Matos, Cristina. "Electrochemical Sensing Platforms for HER2-ECD Breast Cancer Biomarker Detection". Electroanalysis 31 1 (2018): 121-128. http://dx.doi.org/10.1002/elan.201800537. Published • 10.1002/elan.201800537 Pacheco, João G.; Rebelo, Patrícia; Freitas, Maria; Nouws, Henri P.A.; Delerue-Matos, Cristina. "Breast cancer biomarker (HER2-ECD) detection using a molecularly imprinted electrochemical sensor". Sensors and Actuators B: Chemical 273 (2018): 1008-1014. http://dx.doi.org/10.1016/j.snb.2018.06.113. Published • 10.1016/j.snb.2018.06.113 Fernandes, Virgínia Cruz; Freitas, Maria; Pacheco, João P.G.; Oliveira, José Maria; Domingues, Valentina Fernandes; Delerue-Matos, Cristina. "Magnetic dispersive micro solid-phase extraction and gas chromatography determination of organophosphorus pesticides in strawberries". Journal of Chromatography A 1566 (2018): 1-12. http://dx.doi.org/10.1016/j.chroma.2018.06.045. Published • 10.1016/j.chroma.2018.06.045 Freitas, Maria; Nouws, Henri P. A.; Delerue-Matos, Cristina. "Electrochemical Biosensing in Cancer Diagnostics and Follow-up". Electroanalysis 30 8 (2018): 1584-1603. http://dx.doi.org/10.1002/elan.201800193. Published • 10.1002/elan.201800193 Pacheco, João G.; Silva, Marta S.V.; Freitas, Maria; Nouws, Henri P.A.; Delerue-Matos, Cristina. "Molecularly imprinted electrochemical sensor for the point-of-care detection of a breast cancer biomarker (CA 15-3)". Sensors and Actuators B: Chemical 256 (2018): 905-912. http://dx.doi.org/10.1016/j.snb.2017.10.027. Published • 10.1016/j.snb.2017.10.027 Freitas, Maria; Correr, Wagner; Cancino-Bernardi, Juliana; Barroso, M. Fátima; Delerue-Matos, Cristina; Zucolotto, Valtencir. "Impedimetric immunosensors for the detection of Cry1Ab protein from genetically modified maize seeds". Sensors and Actuators B: Chemical 237 (2016): 702-709. http://dx.doi.org/10.1016/j.snb.2016.06.149. Published • 10.1016/j.snb.2016.06.149 Freitas, Maria; Sá Couto, Maria; Barroso, Maria Fátima; Pereira, Clara; de-los-Santos-Álvarez, Noemí; Miranda-Ordieres, Arturo J.; Lobo-Castañón, María Jesús; Delerue-Matos, Cristina. "Highly Monodisperse Fe3O4@Au Superparamagnetic Nanoparticles as Reproducible Platform for Genosensing Genetically Modified Organisms". ACS Sensors 1 8 (2016): 1044-1053. http://dx.doi.org/10.1021/acssensors.6b00182. Published • 10.1021/acssensors.6b00182 Fátima Barroso, M.; Freitas, Maria; Oliveira, M. Beatriz P.P.; de-los-Santos-Álvarez, Noemí; Lobo-Castañón, María Jesús; Delerue-Matos, Cristina. "3D-nanostructured Au electrodes for the event-specific detection of MON810 transgenic maize". Talanta 134 (2015): 158-164. http://dx.doi.org/10.1016/j.talanta.2014.10.017. Published • 10.1016/j.talanta.2014.10.017 Freitas, M.; Viswanathan, S.; Nouws, H.P.A.; Oliveira, M.B.P.P.; Delerue-Matos, C.. "Iron oxide/gold core/shell nanomagnetic probes and CdS biolabels for amplified electrochemical immunosensing of Salmonella typhimurium". Biosensors and Bioelectronics 51 (2014): 195-200. http://dx.doi.org/10.1016/j.bios.2013.07.048. Published • 10.1016/j.bios.2013.07.048
Magazine article	Freitas, M.. Corresponding author: Freitas, M.. "Investigadora integra a equipa que descobriu biossensor que deteta alergias alimentares com mais rapidez", BiggerMagazine, 2023 Freitas, Maria. "First PhD exam at FCUP entirely at a distance (Primeira prova de doutoramento na FCUP inteiramente à distância)", Faculty of Sciences, University of Porto Official Website, 2020, 2020, https://sigarra.up.pt/fcup/pt/noticias_geral.ver_noticia?p_nr=57013. Freitas, Maria; Valtencir Zucolotto. "Physics Institute of São Carlos participates in international network", Physics Institute, University of São Paulo Official Website, 2015, https://www2.ifsc.usp.br/portal-ifsc/ifsc-usp-participa-de-rede-internacional-para-estudo-de-ogms/.
Thesis / Dissertation	Freitas, Maria. "Development of electrochemical immunosensors and immunoassays for breast cancer biomarker analysis". PhD, Universidade do Porto Faculdade de Ciências, 2020. Freitas, Maria. "Electrochemical magnetic immunosensor for Salmonella typhimurium detection in milk samples". Master, Universidade do Porto Faculdade de Farmácia, 2012. Freitas, Maria. "Síntese e avaliação de corantes esquarílicos como sondas fluorescentes para proteínas". Degree, Universidade de Trás-os-Montes e Alto Douro Centro de Química Vila Real, 2010.

Artistic / Performance

Program / Show

Freitas, Maria. 2015. TV USP informa n42. http://www.graq.isep.ipp.pt/index.php?mact=News,cntnt01,detail,0&cntnt01articleid=12&cntnt01returnid=82.

Other

Other output

Voltammetric Immunosensor Based on Oxidized Carbon Nanotubes/Mnfe2o4 Hybrid Nanoplatform for Amplified Detection of Celery (Apium Graveolens). 2024. Teixeira, J.S.; Freitas, M.; Oliveira, C.; Pereira, C.R.; Delerue-Matos, C.; Nouws, H.P.A.. http://www.scopus.com/inward/record.url?eid=2-s2.0-85189050516&partnerID=MN8TOARS.
10.2139/ssrn.4769783

Activities

Oral presentation

	Presentation title	Event name Host (Event location)
2026/06	Molecularly Imprinted Polymer Paper-Based Sensor for Electrochemical Analysis of Genistein in Food Products	20th International Conference on Electroanalysis (ESEAC) (Lisbon, Portugal)
2025/11	Magnetic Hybrid Nanoplatform-Modified Screen-Printed Electrodes for Enhanced Electrochemical Immunosensing Approaches	XXVI Meeting of the Portuguese Electrochemical Society Instituto Politécnico do Porto (Portugal)
2025/11	Electrochemical (bio)assays for food safety and quality evaluation	XXVI Meeting of the Portuguese Electrochemical Society November 19-21, 2025 - Porto, Portu Instituto Politécnico do Porto (Portugal)
2023/11	A paper-based electrochemical immunosensor approach for the detection of pharmaceutical pollutants in fish	II webinar Luso-Brasileiro, Sustainable nanomaterials and electrochemical tools to surveil ecosystems
2023/09/02	Electrochemical immunosensing of food allergens	International Conference on Frontier Areas in Chemical Technologie (India)
2023/08/31	Electrochemical-based immunosensing strategies: Nanostructured and magnetic platform approaches for clinical and food analysis	XXV Meeting of the Portuguese Electrochemical Society (Coimbra, Portugal)
2023/06	Morphologic and elemental characterization of particulate matter from different firefighters’ working environments	5th Doctoral Congress in Engineering (Portugal)
2023/01/16	Core/shell magnetic-gold nanoparticles for the rapid analysis of E. coli O157:H7 through an electrochemical immunoassay	Break Biofilms Conference. (Viena, Austria)
2022/10	Tropomyosin analysis by a label-free electrochemical immunosensor	5th Meeting of Medicinal Biotechnology (5MBtM) and 2nd Iberian Congress on Medicinal Biotechnology (Portugal)
2022/09/01	Electrochemical immunosensors for food allergen analysis	3rd edition of Food Science and Nutrition Technology (United States)
2020/10	Dual electrochemical immunosensor for the simultaneous analysis of two peanut allergens	Analítica 2020 (Lisbon, Portugal)
2019/12	Evaluation of the QuEChERS and magnetic micro dispersive solid-phase extraction of brominated flame retardants in red fruits with determination by GC/MS	11th Meeting on Chromatography (Caparica, Portugal)
2018/06	Non-invasive analysis of the Breast Cancer Biomarker HER2-ECD through Electrochemical Biosensing Strategies	I Iberian Congress on Medicinal Biotechnology, III Meeting of Medicinal Biotechnology (Porto, Portugal)
2015/03/19	An impedimetric immunosensor for Cry1Ab: Application in maize samples	Seminar/meeting, ISEP, Porto, Portugal (Porto, Portugal)
2014/12	Electrochemical impedimetric immunosensor based on modified indium tin oxide electrodes for detection of Cry1Ab protein in genetically modified maize	International Workshop in Biosensors & Biotechnology. 2nd Workshop GMOsensor. Parnaiba, Brazil. 5-7 December, 2014 (Parnaiba, Brazil)
2014/06/08	Development of electrochemical immunosensors: Application in the detection of transgenic maiz	Nanomedicine and Nanotoxicology Group Seminar/meeting Physics Institute, University of São Paulo (IFSC/USP) (São Paulo, Brazil)
2014/03	Synthesis and functionalization of Fe304 core/shell nanoparticles for the electrochemical detection of maize MON810	1st International GMOsensor Workshop, Universidad de Oviedo, Spain. March 10-11, 2014 (Oviedo, Spain)
2012/06	Iron Oxide/Gold core/Shell nanoparticles and screen-printed carbon electrode for sensitive detection of Salmonella typhimurium	3rd Portuguese young chemists meeting (Porto, Portugal)

Supervision

	Thesis Title Role	Degree Subject (Type) Institution / Organization
2025/01 - 2026/06	Development of an electrochemical (bio)sensor for emerging contaminants in environmental and food samples. Co-supervisor	Engenharia Química (Master) Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2025/01 - 2025/06	Development of an Electrochemical Immunosensor for Cystatin C Analysis Supervisor	Engenharia Biomédica (Degree) Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2023 - 2023/07	Master thesis "Immunosensor for the detection of pharmaceuticals as emerging contaminants" Co-supervisor	Engenharia de Biorrecursos (Master) Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2023 - 2023/07	Master thesis "Development of an electrochemical immunosensor for the analysis of a food allergen" Co-supervisor	Engenharia Biomédica (Master) Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2023 - 2023/07	Master thesis "Immunosensor for the determination of pharmaceutical pollutants in fish" Co-supervisor	Engenharia Química (Master) Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2022/09 - 2022/10	Research Initiation Grant (BII) /Analysis and quantification of EU legislated food allergens in commercially available products through a biosensing approach Supervisor	Research Initiation Grant (BII) (Iniciação científica) (Scientific initiation) Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2022 - 2022/09	Master thesis "Food safety and quality control of commercial products: an amperometric immunosensor for the detection and quantification of an egg allergen" Co-supervisor	Engenharia Biomédica (Master) REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Portugal
2021/09 - 2021/10	Research Initiation Grant (BII) / Electrochemical sensors for allergen analysis Co-supervisor	Research Initiation Grant (BII) (Scientific initiation) REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Portugal
2021 - 2021/09	Master thesis "Development of an electrochemical immunosensor for the analysis of a peanut allergen" Co-supervisor	Engenharia Química (Master) Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2021/01 - 2021/07	Graduation thesis - Electrochemical immunosensors for the diagnosis of celiac disease and the analysis of gluten in foods Co-supervisor	Engenharia Biomédica (Degree) Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal

Event organisation

	Event name Type of event (Role)	Institution / Organization
2025/11 - 2025/11	Committee of the National "XXVI Meeting of thePortuguese Electrochemical Society" (2025/11 - 2025/11) Congress (Member of the Organising Committee)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2025/11 - 2025/11	Atividade de divulgação da ciência na Escola Básica da Torrinha: De pequenino é que se desccobre a ciência! (2025/11 - 2025/11) Workshop (Co-organiser)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2025 - 2025	Workshop #4 \| Nanoparticle-based electrochemical biosensor for sensitive food analysis at the XXVI congress of the Portuguese Electrochemical Society (2025/11 - 2025/11) Workshop (Member of the Organising Committee)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2023/11/20 - 2023/11/24	Science dissemination activities "Trail da ciência - GRAQ de porta aberta" (2023) Other (Other)	LAQV - Laboratório Associado para a Química Verde/ REQUIMTE – Rede de Química e Tecnologia, Portugal
2023/11 - 2023/11	OneHealth - Atividades de dissseminação de ciência REQUIMTE/LAQV (2023/11) Exhibition (Other)	Universidade do Porto Instituto de Ciências Biomédicas Abel Salazar, Portugal
2022/07/27 - 2022/07/27	Online Conference "TracAllerSens", +60 registrations (2022/07/27 - 2022/07/27) Conference (President of the Organising Committee)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2019 - 2022	Empowering women in chemistry: a global networking event - Global Women´s breakfast (2019) Meeting (Member of the Organising Committee)	Universidade do Porto Faculdade de Ciências, Portugal
2019/02 - 2019/02	Celebrations of the International Year of the Periodic Table. Tabela periódica humana (2019/02) Exhibition (Member of the Organising Committee)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2019 - 2019	Macroalgas da costa Portuguesa: Uma abordagem económica e nutricional (Macroalgae from the Portuguese coast: An economic and nutritional approach) (2019 - 2019) Workshop (Other)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2016/10 - 2016/10	First Workshop on Electrochemistry Devices (2016/10) Workshop (Co-organiser)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2016/10 - 2016/10	First Workshop on Electrochemistry Devices (2016/10 - 2016/10) Workshop (Member of the Scientific Committee)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal

Event participation

	Activity description Type of event	Event name Institution / Organization
2023/11 - Current	Invited to participate in the congress round table Round table	II Conferencia de Ciências Universidade do Porto Faculdade de Ciências, Portugal
2022/07 - 2022/07	Webinar TracAllerSens Conference	Webinar TracAllerSens Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2021/07 - 2021/07	Pitch/ Poster presentaion Congress	Biosensors 2021 - 31st Anniversary World Congress on Biosensors MDPI AG, Switzerland
2021/06 - 2021/06	Pitch/ Poster presentation Congress	The 1st International Electronic Conference on Chemical Sensors and Analytical Chemistry
2021/01/27 - 2021/01/27	Portuguese-Brazilian Webinar - Electrochemical Sensors for Emerging Contaminants Conference	Portuguese-Brazilian Webinar - Electrochemical Sensors for Emerging Contaminants Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2021/01/20 - 2021/01/20	II NOVAsaúde Nutrition Conference - Environmental pollutants, food and health impact - lessons for the future Conference	II NOVAsaúde Nutrition Conference - Environmental pollutants, food and health impact - lessons for the future Universidade Nova de Lisboa, Portugal
2020/10 - 2020/10	Oral presentation Congress	Analítica 2020, 10º Encontro da Divisão de Química Analítica
2020/06/29 - 2020/06/30	Conference participant / forum for the dissemination of theoretical and applied knowledge in the water domain. Conference	Final conference of Water Reuse for a Sustainable World Project Instituto Politécnico do Porto Grupo de Reação e Análises Químicas, Portugal
2020/04/15 - 2020/04/15	First PhD exam at FCUP entirely online (Primeira prova de doutoramento na FCUP inteiramente à distância) Other	Universidade do Porto Faculdade de Ciências, Portugal
2019/07 - 2019/07	Pitch/Poster presentation and Proceeding Congress	IX Nyna, International congress on analytical nanoscience and nanotechnology. Zaragoza, Spain. July 02-04, 2019
2019/05 - 2019/05	Poster presentation Congress	7th International Symposium on Sensor Science, Napoli, Italy MDPI AG, Switzerland
2018/05 - 2018/05	Invited oral presentation Congress	III Meeting of Medicinal Biotechnology I Iberian Congress on Medicinal Biotechnology Instituto Politécnico do Porto Escola Superior de Saúde, Portugal
2018/05 - 2018/05	Poster presentation Congress	XXIII Meeting of the Portuguese Society of Electrochemistry. Porto, Portugal. May 2-4, 2018
2017/11 - 2017/11	Workshop participation Workshop	2nd Workshop on Electrochemical Devices / 3rd Workshop ELECTROBIONET, Universidad de Oviedo, Spain
2015/03 - 2015/03	Oral presentation Seminar	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2014/12 - 2014/12	Oral presentation Workshop	Workshop International in Biosensors & Biotechnology. II Workshop GMOsensor Universidade Federal do Delta do Parnaíba, Brazil
2014/07/08 - 2014/07/11	Oral presentation Seminar	Universidade de São Paulo, Brazil
2014/03 - 2014/03	Oral presentation Workshop	I International Workshop GMOsensor Departamento de Química Física y Analítica, Universidad de Oviedo, Spain
2014 - 2014	Poster presentation Congress	15th International Conference on Electroanalysis - ESEAC 2014. Malmö, Sweden. June, 11-15, 2014
2012/05 - 2012/05	Oral presentation Congress	3PYCheM
2010/12 - 2010/12	Poster presentation Congress	XVII Congresso Nacional de Bioquímica

Committee member

	Activity description Role	Institution / Organization
2025/11 - 2025/11	Member of Organizing Committee of the National "XXVI Meeting of the Portuguese Electrochemical Society" Member	Instituto Politécnico do Porto, Portugal
2022/07 - 2022/07	Webinar "TracAllerSens" Member	REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Portugal
2016 - 2016	Member of the organizing committee "First workshop on electrochemistry devices" Member	REQUIMTE/LAQV, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Portugal

Course / Discipline taught

	Academic session	Degree Subject (Type)	Institution / Organization
2023/11 - 2023/12	Biosensors	Engenharia Biomédica (Licenciate Degree)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2023 - 2023/08	Curso/disciplina lecionado "Electrochemical-based immunosensing strategies"	(Others)	Universidade de Coimbra, Portugal
2022/10 - 2022/11	Medical Instrumentation and Electronics. Chemistry module / Biosensors	Engenharia Biomédica (Integrated Master's Degree)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2021/10/20 - 2021/11/04	Medical Instrumentation and Electronics. Chemistry module / Biosensors	Engenharia Biomédica (Licenciate Degree)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2020/10/20 - 2020/10/29	Medical Instrumentation and Electronics. Chemistry module / Biosensors	Engenharia Biomédica (Licenciate Degree)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2019/12/07 - 2019/12/10	Chemistry module / Biosensors (Laboratory class)	Engenharia Biomédica (Licenciate Degree)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2019/11/28 - 2019/11/29	Biomedical Sensors network	Engenharia Biomédica (Integrated Master's Degree)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2018/07/23 - 2018/07/27	Characterization and analysis of burnt soils	Curso de Iniciação á investigação 2018 (Licenciate Degree)	Instituto Politécnico do Porto Grupo de Reação e Análises Químicas, Portugal
2018/05 - 2018/05	Chemistry / Biosensors	Engenharia de Computação e Instrumentação Médica (Licenciate Degree)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2017/05 - 2017/05	Chemistry / Biosensors	Engenharia de Computação e Instrumentação Médica (Licenciate Degree)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal
2016/05/14 - 2016/06/30	Chemistry / Biosensors	Engenharia de Computação e Instrumentação Médica (Licenciate Degree)	Instituto Politécnico do Porto Instituto Superior de Engenharia do Porto, Portugal

Interview (newspaper / magazine)

	Activity description	Newspaper / Forum
2023/07	science communication -UTAD "Vencedora do premio Jovem Investigador em Eletroquimica"	UTAD communication
2023/06	science communication - ISEP "Investigadora do ISEP premiada pela SPE"
2023/06	science communication - Universidade do Porto "Alumna da FCUP é a Jovem Investigadora em Eletroquímica do ano"	Noticias Universidade do Porto
2023/06	science communication "Young Researchers Prize - Maria Castro Freitas vence prémio Jovem Investigador em Electroquímica 2023"	REQUIMTE/LAQV
2023/01/01	Investigadora desenvolve biossensor para análise de alergénios alimentares	BiggerMagazine
2022/12/30	Desenvolvimento de Biossensor para deteção de alergénios em alimentos	GuimaraesDigital
2020/05	PhD work dissemination	ISEP/IPP
2020/04/27	Estudante desenvolve método inovador para detetar cancro da mama	ISEP
2015/02/19	interview for the dissemination of the European project and relevant information on the topic for the population	GreenMe
2015/02/04	Interview for the dissemination of the European project and relevant information on the topic for the population	Agência USP de noticias

Interview (tv / radio show)

	Program	Topic
2022/12/19 - Current	RTP1 (Portugal em direto)	Desenvolvimento de biossensores para análise rápidas
2020/05 - Current	Polytechnic of Porto - Official page	P.PORTO TV \| Alumni do ISEP develops innovative method
2015/03/12 - Current	TV USP Informa n.º 42	pesquisa multinacional para desenvolvimento de biossensores de alimentos transgênicos;
2020/05/03 - 2020/05/03	PPorto TV	Estudante desenvolve método inovador para detetar cancro da mama

Journal scientific committee

	Journal title (ISSN)	Publisher
2024 - Current	Food Chemistry (1873-7072)	Elsevier
2023/01 - Current	Current Pediatric Review (1875-6336)	Bentham Science Publisher
2023 - Current	Journal of Agricultural and Food Chemistry (1520-5118)	ACS publications
2022/12 - Current	Heliyon (2405-8440)	CellPress
2022/01 - Current	Electrochimica Acta (0013-4686)	Elsevier
2022 - Current	Nanomaterials (2079-4991)	MDPI (Multidisciplinary Digital Publishing Institute)
2022 - Current	Foods ( 2304-8158)	MDPI (Multidisciplinary Digital Publishing Institute)
2022 - Current	Analytica (2673-4532)	MDPI
2022 - Current	Micromachines (2072-666X)	MDPI
2022 - Current	Biosensors (2079-6374)	MDPI
2022 - Current	Sensors (1424-8220)	MDPI
2021 - Current	Molecules (1420-3049)	MDPI (Multidisciplinary Digital Publishing Institute)

Mentoring / Tutoring

	Topic	Student name
2022 - 2025	Development of analytical strategies for screening and sample preparation for toxin analysis	José Pedro Pereira Rebelo da Rocha
2021/01 - 2024/08	PhD student - Electrochemical (bio)sensors for analysis of safety and quality parameters in processed products	Ricarda Daniela Valentim Da Torre
2023/02 - 2023/02	Smart Choices Program	ND Non Disclosed (Student 7)
2022/11 - 2022/11	Smart Choices Program	ND Non Disclosed (Student 4)
2021/07/01 - 2021/07/31	PhD European Network H2020-MSCA - Bacterial biofilms at early stage of formation using biosensors	Shayesteh Bazsefidpar
2016 - 2017	PhD thesis - Use of Fe3O4@Au magnetic nanoparticles as a nanoplatform for the development of electrochemical genoassays for corn detection	Juliana Beatriz Sousa

Distinctions

Award

2025	Merit Award for Scientific Publication (https://doi.org/10.1016/j.trac.2024.117844) Instituto Politécnico do Porto, Portugal
2025	Merit Award for Scientific Publication (https://doi.org/10.1016/j.foodchem.2024.138889) Instituto Politécnico do Porto, Portugal
2025	Merit Award for Scientific Publication (https://doi.org/10.1016/j.foodchem.2024.140733) Instituto Politécnico do Porto, Portugal
2025	Merit Award for Scientific Publication (https://doi.org/10.1016/j.buildenv.2024.111403) Instituto Politécnico do Porto, Portugal
2023	Merit Award for Scientific Publication (10.1016/j.foodchem.2022.133659) Instituto Politécnico do Porto, Portugal
2023	Young Researcher Prize Sociedade Portuguesa de Electroquímica, Portugal
2022	Individual Call to Scientific Employment Stimulus (CEEC, 5th edition) Fundação para a Ciência e a Tecnologia, Portugal
2018	Merit Award for Scientific Publication (https://doi.org/10.1016/j.snb.2016.06.149) Instituto Politécnico do Porto, Portugal
2014	Merit Award for Scientific Publication (https://doi.org/10.1016/j.bios.2013.07.048) Instituto Politécnico do Porto, Portugal

Other distinction

2023	YEAL - Young Electrochemical Award Lecture Sociedade Portuguesa de Electroquímica, Portugal
2016	Individual PhD FCT Grant - SFRH/BD/111942/2015 Fundação para a Ciência e a Tecnologia, Portugal
2014	Grant - Marie Curie Actions, FP7-PEOPLE-2013-IRSES \| 612545 European Commission, Research & Innovation, Marie Curie Actions, Belgium