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Solid-State rGO-PEDOT:PSS Transducing Material for Cost-Effective Enzymatic Sensing

Performance of a sensing device is dependent on its construction material, especially for components that are directly involved in transporting and translating signals across the device. Understanding the morphology and characteristics of the material components is therefore crucial in the developme...

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Autores principales: Abd-Wahab, Firdaus, Abdul Guthoos, Habibah Farhana, Wan Salim, Wan Wardatul Amani
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6468658/
https://www.ncbi.nlm.nih.gov/pubmed/30832254
http://dx.doi.org/10.3390/bios9010036
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author Abd-Wahab, Firdaus
Abdul Guthoos, Habibah Farhana
Wan Salim, Wan Wardatul Amani
author_facet Abd-Wahab, Firdaus
Abdul Guthoos, Habibah Farhana
Wan Salim, Wan Wardatul Amani
author_sort Abd-Wahab, Firdaus
collection PubMed
description Performance of a sensing device is dependent on its construction material, especially for components that are directly involved in transporting and translating signals across the device. Understanding the morphology and characteristics of the material components is therefore crucial in the development of any sensing device. This work examines the morphological and electrochemical characteristics of reduced graphene oxide interspersed with poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (rGO-PEDOT:PSS) used as a transducer material deposited on a commercially available screen-printed carbon electrode (SPCE). Electron microscopy shows that PEDOT:PSS is interspersed between rGO layers. Raman and XRD analyses suggest that the graphene crystallinity in GO-PEDOT:PSS and rGO-PEDOT:PSS remains intact. Instead, PEDOT:PSS undergoes a change in structure to allow PEDOT to blend into the graphene structure and partake in the π-π interaction with the surface of the rGO layers. Incorporation of PEDOT:PSS also appears to improve the electrochemical behavior of the composite, leading to a higher peak current of 1.184 mA, as measured by cyclic voltammetry, compared to 0.522 mA when rGO is used alone. The rGO-PEDOT:PSS transducing material blended with glucose oxidase was tested for glucose detection. The sensitivity of glucose detection was shown to be 57.3 µA/(mM·cm(2)) with a detection limit of 86.8 µM.
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spelling pubmed-64686582019-04-23 Solid-State rGO-PEDOT:PSS Transducing Material for Cost-Effective Enzymatic Sensing Abd-Wahab, Firdaus Abdul Guthoos, Habibah Farhana Wan Salim, Wan Wardatul Amani Biosensors (Basel) Article Performance of a sensing device is dependent on its construction material, especially for components that are directly involved in transporting and translating signals across the device. Understanding the morphology and characteristics of the material components is therefore crucial in the development of any sensing device. This work examines the morphological and electrochemical characteristics of reduced graphene oxide interspersed with poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (rGO-PEDOT:PSS) used as a transducer material deposited on a commercially available screen-printed carbon electrode (SPCE). Electron microscopy shows that PEDOT:PSS is interspersed between rGO layers. Raman and XRD analyses suggest that the graphene crystallinity in GO-PEDOT:PSS and rGO-PEDOT:PSS remains intact. Instead, PEDOT:PSS undergoes a change in structure to allow PEDOT to blend into the graphene structure and partake in the π-π interaction with the surface of the rGO layers. Incorporation of PEDOT:PSS also appears to improve the electrochemical behavior of the composite, leading to a higher peak current of 1.184 mA, as measured by cyclic voltammetry, compared to 0.522 mA when rGO is used alone. The rGO-PEDOT:PSS transducing material blended with glucose oxidase was tested for glucose detection. The sensitivity of glucose detection was shown to be 57.3 µA/(mM·cm(2)) with a detection limit of 86.8 µM. MDPI 2019-03-01 /pmc/articles/PMC6468658/ /pubmed/30832254 http://dx.doi.org/10.3390/bios9010036 Text en © 2019 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Abd-Wahab, Firdaus
Abdul Guthoos, Habibah Farhana
Wan Salim, Wan Wardatul Amani
Solid-State rGO-PEDOT:PSS Transducing Material for Cost-Effective Enzymatic Sensing
title Solid-State rGO-PEDOT:PSS Transducing Material for Cost-Effective Enzymatic Sensing
title_full Solid-State rGO-PEDOT:PSS Transducing Material for Cost-Effective Enzymatic Sensing
title_fullStr Solid-State rGO-PEDOT:PSS Transducing Material for Cost-Effective Enzymatic Sensing
title_full_unstemmed Solid-State rGO-PEDOT:PSS Transducing Material for Cost-Effective Enzymatic Sensing
title_short Solid-State rGO-PEDOT:PSS Transducing Material for Cost-Effective Enzymatic Sensing
title_sort solid-state rgo-pedot:pss transducing material for cost-effective enzymatic sensing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6468658/
https://www.ncbi.nlm.nih.gov/pubmed/30832254
http://dx.doi.org/10.3390/bios9010036
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