Modification of Screen-Printed Carbon Electrode with Nanogold for Detection of Glucose

The properties of screen-printed carbon electrodes (SPCE) with nanogold (AuNP) were ascertained to detect glucose samples. The electrodes were modified with different potentials to obtain suitable potentials for the detection of glucose. The potentials used to prepare gold electrodes were -0.8 V, +0...

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Published in:Malaysian Journal of Chemistry
Main Author: Fakhruddin N.Z.; Mohd Y.; Zaki M.H.M.
Format: Article
Language:English
Published: Malaysian Institute of Chemistry 2024
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85206094509&doi=10.55373%2fmjchem.v26i5.90&partnerID=40&md5=feb0c11014195a0e16b97d3a3ceead55
id 2-s2.0-85206094509
spelling 2-s2.0-85206094509
Fakhruddin N.Z.; Mohd Y.; Zaki M.H.M.
Modification of Screen-Printed Carbon Electrode with Nanogold for Detection of Glucose
2024
Malaysian Journal of Chemistry
26
5
10.55373/mjchem.v26i5.90
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85206094509&doi=10.55373%2fmjchem.v26i5.90&partnerID=40&md5=feb0c11014195a0e16b97d3a3ceead55
The properties of screen-printed carbon electrodes (SPCE) with nanogold (AuNP) were ascertained to detect glucose samples. The electrodes were modified with different potentials to obtain suitable potentials for the detection of glucose. The potentials used to prepare gold electrodes were -0.8 V, +0.56 V, and +0.9 V. The bare SPCE acted as a comparison between the bare and the modified SPCE. The modified electrodes (AuNP/SPCE) were characterised using Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray (EDX), and X-ray Diffraction (XRD) with deposition at -0.8 V and +0.56 V, proving that the gold nanostructures were deposited at the SPCE surface. The deposition at +0.9 V had an insignificant amount of Au on the SPCE surface, similar to bare SPCE. The active sites and reversibility of the gold electrode can be determined by measuring the electrochemical active surface area (ECSA) of electrode and its anodic and cathodic peak current density ratio (Ipa/Ipc), respectively. The ECSA for modified SPCE with different potentials of -0.8 V, +0.56 V, and +0.9 V were 6.873 cm2, 0.786 cm2, and 0.253 cm2, respectively. The Ipa/Ipc ratio of +0.56 V and -0.8 V showed excellent reversibility and transfer rate compared to +0.9 V. Thus, deposition at -0.8 V and +0.56 V was chosen to detect glucose, and the sensitivity and limit of detection (LOD) were calculated. The sensitivity and LOD for these two modified electrodes (-0.8 V and +0.56 V) were 7.53 mA.mM-1cm-2 and 14.73 mM, as well as 73.38 mA.mM-1cm-2 and 13.13 mM, respectively. © 2024 Malaysian Institute of Chemistry. All rights reserved.
Malaysian Institute of Chemistry
15112292
English
Article

author Fakhruddin N.Z.; Mohd Y.; Zaki M.H.M.
spellingShingle Fakhruddin N.Z.; Mohd Y.; Zaki M.H.M.
Modification of Screen-Printed Carbon Electrode with Nanogold for Detection of Glucose
author_facet Fakhruddin N.Z.; Mohd Y.; Zaki M.H.M.
author_sort Fakhruddin N.Z.; Mohd Y.; Zaki M.H.M.
title Modification of Screen-Printed Carbon Electrode with Nanogold for Detection of Glucose
title_short Modification of Screen-Printed Carbon Electrode with Nanogold for Detection of Glucose
title_full Modification of Screen-Printed Carbon Electrode with Nanogold for Detection of Glucose
title_fullStr Modification of Screen-Printed Carbon Electrode with Nanogold for Detection of Glucose
title_full_unstemmed Modification of Screen-Printed Carbon Electrode with Nanogold for Detection of Glucose
title_sort Modification of Screen-Printed Carbon Electrode with Nanogold for Detection of Glucose
publishDate 2024
container_title Malaysian Journal of Chemistry
container_volume 26
container_issue 5
doi_str_mv 10.55373/mjchem.v26i5.90
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85206094509&doi=10.55373%2fmjchem.v26i5.90&partnerID=40&md5=feb0c11014195a0e16b97d3a3ceead55
description The properties of screen-printed carbon electrodes (SPCE) with nanogold (AuNP) were ascertained to detect glucose samples. The electrodes were modified with different potentials to obtain suitable potentials for the detection of glucose. The potentials used to prepare gold electrodes were -0.8 V, +0.56 V, and +0.9 V. The bare SPCE acted as a comparison between the bare and the modified SPCE. The modified electrodes (AuNP/SPCE) were characterised using Field Emission Scanning Electron Microscopy (FESEM), Energy Dispersive X-ray (EDX), and X-ray Diffraction (XRD) with deposition at -0.8 V and +0.56 V, proving that the gold nanostructures were deposited at the SPCE surface. The deposition at +0.9 V had an insignificant amount of Au on the SPCE surface, similar to bare SPCE. The active sites and reversibility of the gold electrode can be determined by measuring the electrochemical active surface area (ECSA) of electrode and its anodic and cathodic peak current density ratio (Ipa/Ipc), respectively. The ECSA for modified SPCE with different potentials of -0.8 V, +0.56 V, and +0.9 V were 6.873 cm2, 0.786 cm2, and 0.253 cm2, respectively. The Ipa/Ipc ratio of +0.56 V and -0.8 V showed excellent reversibility and transfer rate compared to +0.9 V. Thus, deposition at -0.8 V and +0.56 V was chosen to detect glucose, and the sensitivity and limit of detection (LOD) were calculated. The sensitivity and LOD for these two modified electrodes (-0.8 V and +0.56 V) were 7.53 mA.mM-1cm-2 and 14.73 mM, as well as 73.38 mA.mM-1cm-2 and 13.13 mM, respectively. © 2024 Malaysian Institute of Chemistry. All rights reserved.
publisher Malaysian Institute of Chemistry
issn 15112292
language English
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