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Analytical modelling of monolayer graphene-based ion-sensitive FET to pH changes
Graphene has attracted great interest because of unique properties such as high sensitivity, high mobility, and biocompatibility. It is also known as a superior candidate for pH sensing. Graphene-based ion-sensitive field-effect transistor (ISFET) is currently getting much attention as a novel mater...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3662162/ https://www.ncbi.nlm.nih.gov/pubmed/23590751 http://dx.doi.org/10.1186/1556-276X-8-173 |
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author | Kiani, Mohammad Javad Ahmadi, Mohammad Taghi Karimi Feiz Abadi, Hediyeh Rahmani, Meisam Hashim, Amin Che harun, Fauzan Khairi |
author_facet | Kiani, Mohammad Javad Ahmadi, Mohammad Taghi Karimi Feiz Abadi, Hediyeh Rahmani, Meisam Hashim, Amin Che harun, Fauzan Khairi |
author_sort | Kiani, Mohammad Javad |
collection | PubMed |
description | Graphene has attracted great interest because of unique properties such as high sensitivity, high mobility, and biocompatibility. It is also known as a superior candidate for pH sensing. Graphene-based ion-sensitive field-effect transistor (ISFET) is currently getting much attention as a novel material with organic nature and ionic liquid gate that is intrinsically sensitive to pH changes. pH is an important factor in enzyme stabilities which can affect the enzymatic reaction and broaden the number of enzyme applications. More accurate and consistent results of enzymes must be optimized to realize their full potential as catalysts accordingly. In this paper, a monolayer graphene-based ISFET pH sensor is studied by simulating its electrical measurement of buffer solutions for different pH values. Electrical detection model of each pH value is suggested by conductance modelling of monolayer graphene. Hydrogen ion (H(+)) concentration as a function of carrier concentration is proposed, and the control parameter (Ƥ) is defined based on the electro-active ions absorbed by the surface of the graphene with different pH values. Finally, the proposed new analytical model is compared with experimental data and shows good overall agreement. |
format | Online Article Text |
id | pubmed-3662162 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Springer |
record_format | MEDLINE/PubMed |
spelling | pubmed-36621622013-05-23 Analytical modelling of monolayer graphene-based ion-sensitive FET to pH changes Kiani, Mohammad Javad Ahmadi, Mohammad Taghi Karimi Feiz Abadi, Hediyeh Rahmani, Meisam Hashim, Amin Che harun, Fauzan Khairi Nanoscale Res Lett Nano Idea Graphene has attracted great interest because of unique properties such as high sensitivity, high mobility, and biocompatibility. It is also known as a superior candidate for pH sensing. Graphene-based ion-sensitive field-effect transistor (ISFET) is currently getting much attention as a novel material with organic nature and ionic liquid gate that is intrinsically sensitive to pH changes. pH is an important factor in enzyme stabilities which can affect the enzymatic reaction and broaden the number of enzyme applications. More accurate and consistent results of enzymes must be optimized to realize their full potential as catalysts accordingly. In this paper, a monolayer graphene-based ISFET pH sensor is studied by simulating its electrical measurement of buffer solutions for different pH values. Electrical detection model of each pH value is suggested by conductance modelling of monolayer graphene. Hydrogen ion (H(+)) concentration as a function of carrier concentration is proposed, and the control parameter (Ƥ) is defined based on the electro-active ions absorbed by the surface of the graphene with different pH values. Finally, the proposed new analytical model is compared with experimental data and shows good overall agreement. Springer 2013-04-16 /pmc/articles/PMC3662162/ /pubmed/23590751 http://dx.doi.org/10.1186/1556-276X-8-173 Text en Copyright ©2013 Kiani et al.; licensee Springer. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Nano Idea Kiani, Mohammad Javad Ahmadi, Mohammad Taghi Karimi Feiz Abadi, Hediyeh Rahmani, Meisam Hashim, Amin Che harun, Fauzan Khairi Analytical modelling of monolayer graphene-based ion-sensitive FET to pH changes |
title | Analytical modelling of monolayer graphene-based ion-sensitive FET to pH changes |
title_full | Analytical modelling of monolayer graphene-based ion-sensitive FET to pH changes |
title_fullStr | Analytical modelling of monolayer graphene-based ion-sensitive FET to pH changes |
title_full_unstemmed | Analytical modelling of monolayer graphene-based ion-sensitive FET to pH changes |
title_short | Analytical modelling of monolayer graphene-based ion-sensitive FET to pH changes |
title_sort | analytical modelling of monolayer graphene-based ion-sensitive fet to ph changes |
topic | Nano Idea |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3662162/ https://www.ncbi.nlm.nih.gov/pubmed/23590751 http://dx.doi.org/10.1186/1556-276X-8-173 |
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