Label-Free Electrochemical Detection of Vanillin through Low-Defect Graphene Electrodes Modified with Au Nanoparticles
Graphene is an excellent modifier for the surface modification of electrochemical electrodes due to its exceptional physical properties and, for the development of graphene-based chemical and biosensors, is usually coated on glassy carbon electrodes (GCEs) via drop casting. However, the ease of aggr...
Main Authors: | , , , , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2018-03-01
|
Series: | Materials |
Subjects: | |
Online Access: | http://www.mdpi.com/1996-1944/11/4/489 |
id |
doaj-175c328b2f854557af48b4872541aaec |
---|---|
record_format |
Article |
spelling |
doaj-175c328b2f854557af48b4872541aaec2020-11-24T21:54:03ZengMDPI AGMaterials1996-19442018-03-0111448910.3390/ma11040489ma11040489Label-Free Electrochemical Detection of Vanillin through Low-Defect Graphene Electrodes Modified with Au NanoparticlesJingyao Gao0Qilong Yuan1Chen Ye2Pei Guo3Shiyu Du4Guosong Lai5Aimin Yu6Nan Jiang7Li Fu8Cheng-Te Lin9Kuan W.A. Chee10Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, ChinaKey Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, ChinaKey Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, ChinaKey Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, ChinaNingbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, ChinaDepartment of Chemistry, Hubei Normal University, Huangshi 435002, ChinaDepartment of Chemistry and Biotechnology, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia; aiminyu@swin.edu.auKey Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, ChinaCollege of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, ChinaKey Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, ChinaDepartment of Electrical and Electronic Engineering, Faculty of Science and Engineering, University of Nottingham, Ningbo 315100, ChinaGraphene is an excellent modifier for the surface modification of electrochemical electrodes due to its exceptional physical properties and, for the development of graphene-based chemical and biosensors, is usually coated on glassy carbon electrodes (GCEs) via drop casting. However, the ease of aggregation and high defect content of reduced graphene oxides degrade the electrical properties. Here, we fabricated low-defect graphene electrodes by catalytically thermal treatment of HPHT diamond substrate, followed by the electrodeposition of Au nanoparticles (AuNPs) with an average size of ≈60 nm on the electrode surface using cyclic voltammetry. The Au nanoparticle-decorated graphene electrodes show a wide linear response range to vanillin from 0.2 to 40 µM with a low limit of detection of 10 nM. This work demonstrates the potential applications of graphene-based hybrid electrodes for highly sensitive chemical detection.http://www.mdpi.com/1996-1944/11/4/489low-defect graphenesp3-to-sp2 conversiongold nanoparticles modificationvanillinelectrochemical detection |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jingyao Gao Qilong Yuan Chen Ye Pei Guo Shiyu Du Guosong Lai Aimin Yu Nan Jiang Li Fu Cheng-Te Lin Kuan W.A. Chee |
spellingShingle |
Jingyao Gao Qilong Yuan Chen Ye Pei Guo Shiyu Du Guosong Lai Aimin Yu Nan Jiang Li Fu Cheng-Te Lin Kuan W.A. Chee Label-Free Electrochemical Detection of Vanillin through Low-Defect Graphene Electrodes Modified with Au Nanoparticles Materials low-defect graphene sp3-to-sp2 conversion gold nanoparticles modification vanillin electrochemical detection |
author_facet |
Jingyao Gao Qilong Yuan Chen Ye Pei Guo Shiyu Du Guosong Lai Aimin Yu Nan Jiang Li Fu Cheng-Te Lin Kuan W.A. Chee |
author_sort |
Jingyao Gao |
title |
Label-Free Electrochemical Detection of Vanillin through Low-Defect Graphene Electrodes Modified with Au Nanoparticles |
title_short |
Label-Free Electrochemical Detection of Vanillin through Low-Defect Graphene Electrodes Modified with Au Nanoparticles |
title_full |
Label-Free Electrochemical Detection of Vanillin through Low-Defect Graphene Electrodes Modified with Au Nanoparticles |
title_fullStr |
Label-Free Electrochemical Detection of Vanillin through Low-Defect Graphene Electrodes Modified with Au Nanoparticles |
title_full_unstemmed |
Label-Free Electrochemical Detection of Vanillin through Low-Defect Graphene Electrodes Modified with Au Nanoparticles |
title_sort |
label-free electrochemical detection of vanillin through low-defect graphene electrodes modified with au nanoparticles |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2018-03-01 |
description |
Graphene is an excellent modifier for the surface modification of electrochemical electrodes due to its exceptional physical properties and, for the development of graphene-based chemical and biosensors, is usually coated on glassy carbon electrodes (GCEs) via drop casting. However, the ease of aggregation and high defect content of reduced graphene oxides degrade the electrical properties. Here, we fabricated low-defect graphene electrodes by catalytically thermal treatment of HPHT diamond substrate, followed by the electrodeposition of Au nanoparticles (AuNPs) with an average size of ≈60 nm on the electrode surface using cyclic voltammetry. The Au nanoparticle-decorated graphene electrodes show a wide linear response range to vanillin from 0.2 to 40 µM with a low limit of detection of 10 nM. This work demonstrates the potential applications of graphene-based hybrid electrodes for highly sensitive chemical detection. |
topic |
low-defect graphene sp3-to-sp2 conversion gold nanoparticles modification vanillin electrochemical detection |
url |
http://www.mdpi.com/1996-1944/11/4/489 |
work_keys_str_mv |
AT jingyaogao labelfreeelectrochemicaldetectionofvanillinthroughlowdefectgrapheneelectrodesmodifiedwithaunanoparticles AT qilongyuan labelfreeelectrochemicaldetectionofvanillinthroughlowdefectgrapheneelectrodesmodifiedwithaunanoparticles AT chenye labelfreeelectrochemicaldetectionofvanillinthroughlowdefectgrapheneelectrodesmodifiedwithaunanoparticles AT peiguo labelfreeelectrochemicaldetectionofvanillinthroughlowdefectgrapheneelectrodesmodifiedwithaunanoparticles AT shiyudu labelfreeelectrochemicaldetectionofvanillinthroughlowdefectgrapheneelectrodesmodifiedwithaunanoparticles AT guosonglai labelfreeelectrochemicaldetectionofvanillinthroughlowdefectgrapheneelectrodesmodifiedwithaunanoparticles AT aiminyu labelfreeelectrochemicaldetectionofvanillinthroughlowdefectgrapheneelectrodesmodifiedwithaunanoparticles AT nanjiang labelfreeelectrochemicaldetectionofvanillinthroughlowdefectgrapheneelectrodesmodifiedwithaunanoparticles AT lifu labelfreeelectrochemicaldetectionofvanillinthroughlowdefectgrapheneelectrodesmodifiedwithaunanoparticles AT chengtelin labelfreeelectrochemicaldetectionofvanillinthroughlowdefectgrapheneelectrodesmodifiedwithaunanoparticles AT kuanwachee labelfreeelectrochemicaldetectionofvanillinthroughlowdefectgrapheneelectrodesmodifiedwithaunanoparticles |
_version_ |
1725869286388400128 |