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Graphene Flakes Decorated with Dispersed Gold Nanoparticles as Nanomaterial Layer for ISEs

This paper proposes a new type of solid-contact layer based on graphene/gold nanoparticles for ion-selective electrodes. A novel approach to preparing the material for intermediate layer by modifying the graphene flakes by gold nanoparticles is presented. With this approach, we observed a large surf...

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Autores principales: Niemiec, Barbara, Lenar, Nikola, Piech, Robert, Skupień, Krzysztof, Paczosa-Bator, Beata
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8306562/
https://www.ncbi.nlm.nih.gov/pubmed/34357198
http://dx.doi.org/10.3390/membranes11070548
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author Niemiec, Barbara
Lenar, Nikola
Piech, Robert
Skupień, Krzysztof
Paczosa-Bator, Beata
author_facet Niemiec, Barbara
Lenar, Nikola
Piech, Robert
Skupień, Krzysztof
Paczosa-Bator, Beata
author_sort Niemiec, Barbara
collection PubMed
description This paper proposes a new type of solid-contact layer based on graphene/gold nanoparticles for ion-selective electrodes. A novel approach to preparing the material for intermediate layer by modifying the graphene flakes by gold nanoparticles is presented. With this approach, we observed a large surface area of material and in consequence high electrical capacitance of electrodes. We have obtained satisfactory results demonstrating that the modification of graphene with gold allows for enhancing electrical and wetting properties of carbon nanomaterial. Electrical capacitance of designed nanocomposite-contacted electrode equals to approximately 280 µF, which in consequence ensures great long-term potential stability defined by the potential drift of 36 μV/h. The modification of graphene with nanoparticles completely changed its wetting properties, as the designed material turned out to be hydrophobic with a water contact angle of 115°. Graphene/gold nanoparticles–contacted electrodes are insensitive to the changing light conditions, exhibiting near-Nernstian response in the potassium concentration range between 10(−5.9) M and 10(−1) M of K(+) ions and may be applied in the pH range between 2 and 10.5.
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spelling pubmed-83065622021-07-25 Graphene Flakes Decorated with Dispersed Gold Nanoparticles as Nanomaterial Layer for ISEs Niemiec, Barbara Lenar, Nikola Piech, Robert Skupień, Krzysztof Paczosa-Bator, Beata Membranes (Basel) Article This paper proposes a new type of solid-contact layer based on graphene/gold nanoparticles for ion-selective electrodes. A novel approach to preparing the material for intermediate layer by modifying the graphene flakes by gold nanoparticles is presented. With this approach, we observed a large surface area of material and in consequence high electrical capacitance of electrodes. We have obtained satisfactory results demonstrating that the modification of graphene with gold allows for enhancing electrical and wetting properties of carbon nanomaterial. Electrical capacitance of designed nanocomposite-contacted electrode equals to approximately 280 µF, which in consequence ensures great long-term potential stability defined by the potential drift of 36 μV/h. The modification of graphene with nanoparticles completely changed its wetting properties, as the designed material turned out to be hydrophobic with a water contact angle of 115°. Graphene/gold nanoparticles–contacted electrodes are insensitive to the changing light conditions, exhibiting near-Nernstian response in the potassium concentration range between 10(−5.9) M and 10(−1) M of K(+) ions and may be applied in the pH range between 2 and 10.5. MDPI 2021-07-20 /pmc/articles/PMC8306562/ /pubmed/34357198 http://dx.doi.org/10.3390/membranes11070548 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Niemiec, Barbara
Lenar, Nikola
Piech, Robert
Skupień, Krzysztof
Paczosa-Bator, Beata
Graphene Flakes Decorated with Dispersed Gold Nanoparticles as Nanomaterial Layer for ISEs
title Graphene Flakes Decorated with Dispersed Gold Nanoparticles as Nanomaterial Layer for ISEs
title_full Graphene Flakes Decorated with Dispersed Gold Nanoparticles as Nanomaterial Layer for ISEs
title_fullStr Graphene Flakes Decorated with Dispersed Gold Nanoparticles as Nanomaterial Layer for ISEs
title_full_unstemmed Graphene Flakes Decorated with Dispersed Gold Nanoparticles as Nanomaterial Layer for ISEs
title_short Graphene Flakes Decorated with Dispersed Gold Nanoparticles as Nanomaterial Layer for ISEs
title_sort graphene flakes decorated with dispersed gold nanoparticles as nanomaterial layer for ises
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8306562/
https://www.ncbi.nlm.nih.gov/pubmed/34357198
http://dx.doi.org/10.3390/membranes11070548
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