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Your search keyword '"Santos, Nuno F."' showing total 19 results
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19 results on '"Santos, Nuno F."'

8. Label-free plasmonic immunosensor for cortisol detection in a D-shaped optical fiber

Author

Soares, Maria S., primary, Silva, Luís C. B., additional, Vidal, Miguel, additional, Loyez, Médéric, additional, Facão, Margarida, additional, Caucheteur, Christophe, additional, Segatto, Marcelo E. V., additional, Costa, Florinda M., additional, Leitão, Cátia, additional, Pereira, Sónia O., additional, Santos, Nuno F., additional, and Marques, Carlos A. F., additional

Published
2022
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13. A critical review on the production and application of graphene and graphene-based materials in anti-corrosion coatings

Author

Kulyk, Bohdan, primary, Freitas, Maria A., additional, Santos, Nuno F., additional, Mohseni, Farzin, additional, Carvalho, Alexandre F., additional, Yasakau, Kiryl, additional, Fernandes, António J. S., additional, Bernardes, Adriana, additional, Figueiredo, Bruno, additional, Silva, Rui, additional, Tedim, João, additional, and Costa, Florinda M., additional

Published
2021
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14. Physical Structure and Electrochemical Response of Diamond–Graphite Nanoplatelets: From CVD Synthesis to Label-Free Biosensors

Author

Santos, Nuno F., primary, Pereira, Sónia O., additional, Fernandes, António J. S., additional, Vasconcelos, Thiago L., additional, Fung, Chung M., additional, Archanjo, Bráulio S., additional, Achete, Carlos A., additional, Teixeira, Sofia R., additional, Silva, Rui F., additional, and Costa, Florinda M., additional

Published
2019
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16. A critical review on the production and application of graphene and graphene-based materials in anti-corrosion coatings.

Author

Kulyk, Bohdan, Freitas, Maria A., Santos, Nuno F., Mohseni, Farzin, Carvalho, Alexandre F., Yasakau, Kiryl, Fernandes, António J. S., Bernardes, Adriana, Figueiredo, Bruno, Silva, Rui, Tedim, João, and Costa, Florinda M.

Subjects
GRAPHENE, GRAPHENE oxide, COMPOSITE coating, SURFACE coatings, POLYMERIC composites, SERVICE life, CORROSION & anti-corrosives
Abstract

Among the many potential applications of graphene and graphene-based materials, their use as protective films or as additives in coatings for corrosion protection has seen an increased level of interest in the last decade. Much of this interest is motivated by the need to implement additional functionalities, to enhance anti-corrosion performance and to ultimately extend the service life of metallic structures. Pristine graphene films, with their impermeable nature allied to flexibility and mechanical strength, appear as particularly attractive candidates for barrier films against corrosive agents, while graphene-based materials such as graphene oxide and reduced graphene oxide offer a wide range of opportunities for their dispersion in polymeric matrices for composite anti-corrosive coatings. Simultaneously, considerable progress in the development of scalable graphene and graphene-based materials production techniques has been made during the last several years. Currently, a broad range of graphene materials with different morphologies and properties is available, making the need for an adequate fit between the production method and the desired application even more evident. This review article aims to give the reader a general overview of the recent trends in both the production of graphene and graphene-based materials, and their implementation in different anti-corrosion solutions. Moreover, the present work provides a critical look on this subject, highlighting the areas in need of further exploration. [ABSTRACT FROM AUTHOR]

Published
2022
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19. Dual Transduction of H 2 O 2 Detection Using ZnO/Laser-Induced Graphene Composites.

Author

Zanoni, Julia, Moura, Jorge P., Santos, Nuno F., Carvalho, Alexandre F., Fernandes, António J. S., Monteiro, Teresa, Costa, Florinda M., Pereira, Sónia O., Rodrigues, Joana, Rovisco, Ana, and Comini, Elisabetta

Subjects
GENETIC transduction, GRAPHENE, CHARGE exchange, IMPEDANCE spectroscopy, CYCLIC voltammetry, ZINC oxide
Abstract

Zinc oxide (ZnO)/laser-induced graphene (LIG) composites were prepared by mixing ZnO, grown by laser-assisted flow deposition, with LIG produced by laser irradiation of a polyimide, both in ambient conditions. Different ZnO:LIG ratios were used to infer the effect of this combination on the overall composite behavior. The optical properties, assessed by photoluminescence (PL), showed an intensity increase of the excitonic-related recombination with increasing LIG amounts, along with a reduction in the visible emission band. Charge-transfer processes between the two materials are proposed to justify these variations. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy evidenced increased electron transfer kinetics and an electrochemically active area with the amount of LIG incorporated in the composites. As the composites were designed to be used as transducer platforms in biosensing devices, their ability to detect and quantify hydrogen peroxide (H2O2) was assessed by both PL and CV analysis. The results demonstrated that both methods can be employed for sensing, displaying slightly distinct operation ranges that allow extending the detection range by combining both transduction approaches. Moreover, limits of detection as low as 0.11 mM were calculated in a tested concentration range from 0.8 to 32.7 mM, in line with the values required for their potential application in biosensors. [ABSTRACT FROM AUTHOR]

Published
2021
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