Next Article in Journal
Osteogenic Potential of Pre-Osteoblastic Cells on a Chitosan-graft-Polycaprolactone Copolymer
Next Article in Special Issue
Morphological Evolution of Vertically Standing Molybdenum Disulfide Nanosheets by Chemical Vapor Deposition
Previous Article in Journal
Photocatalytic Activity of Nanotubular TiO2 Films Obtained by Anodic Oxidation: A Comparison in Gas and Liquid Phase
Previous Article in Special Issue
Highly Sensitive and Selective Potassium Ion Detection Based on Graphene Hall Effect Biosensors
Article Menu
Issue 4 (April) cover image

Export Article

Open AccessCommunication
Materials 2018, 11(4), 489; https://doi.org/10.3390/ma11040489

Label-Free Electrochemical Detection of Vanillin through Low-Defect Graphene Electrodes Modified with Au Nanoparticles

1,2,†
,
1,3,†
,
1,2
,
1,4
,
5
,
6
,
7, 1,2,* , 8,* , 1,2,* and 3
1
Key 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, China
2
College of Material Science and Optoelectronic Technology, University of Chinese Academy of Sciences, 19 A Yuquan Rd., Shijingshan District, Beijing 100049, China
3
Department of Electrical and Electronic Engineering, Faculty of Science and Engineering, University of Nottingham, Ningbo 315100, China
4
Department of Physics, Liaoning University, Shenyang 110000, China
5
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
6
Department of Chemistry, Hubei Normal University, Huangshi 435002, China
7
Department of Chemistry and Biotechnology, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia; aiminyu@swin.edu.au
8
College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
These authors contribute equally.
*
Authors to whom correspondence should be addressed.
Received: 26 February 2018 / Revised: 16 March 2018 / Accepted: 20 March 2018 / Published: 25 March 2018
(This article belongs to the Special Issue Recent Advances in 2D Nanomaterials)
View Full-Text   |   Download PDF [11267 KB, uploaded 3 May 2018]   |  

Abstract

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. View Full-Text
Keywords: low-defect graphene; sp3-to-sp2 conversion; gold nanoparticles modification; vanillin; electrochemical detection low-defect graphene; sp3-to-sp2 conversion; gold nanoparticles modification; vanillin; electrochemical detection
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Gao, J.; Yuan, Q.; Ye, C.; Guo, P.; Du, S.; Lai, G.; Yu, A.; Jiang, N.; Fu, L.; Lin, C.-T.; Chee, K.W. Label-Free Electrochemical Detection of Vanillin through Low-Defect Graphene Electrodes Modified with Au Nanoparticles. Materials 2018, 11, 489.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top