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Preparation of highly water dispersible functional graphene/silver nanocomposite for the detection of melamine

A stable aqueous suspension of a functional graphene/silver (FG/Ag) nanocomposite was prepared by an environmentally friendly hydrothermal method. The precursor, functional graphene oxide (FGO), was prepared by covalent functionalisation of graphene oxide (GO) with a hydrophilic organosilane, N-(tri...

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Main Authors: Kumar, S. Vijay, Huang, Nay Ming, Lim, Hong Ngee, Zainy, Mazlinda, Harrison, Ian, Chia, Chin Hua
Format: Article
Language:English
Published: Elsevier 2013
Online Access:http://psasir.upm.edu.my/id/eprint/30022/1/Preparation%20of%20highly%20water%20dispersible%20functional%20graphene.pdf
http://psasir.upm.edu.my/id/eprint/30022/
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spelling my.upm.eprints.300222016-03-21T09:09:15Z http://psasir.upm.edu.my/id/eprint/30022/ Preparation of highly water dispersible functional graphene/silver nanocomposite for the detection of melamine Kumar, S. Vijay Huang, Nay Ming Lim, Hong Ngee Zainy, Mazlinda Harrison, Ian Chia, Chin Hua A stable aqueous suspension of a functional graphene/silver (FG/Ag) nanocomposite was prepared by an environmentally friendly hydrothermal method. The precursor, functional graphene oxide (FGO), was prepared by covalent functionalisation of graphene oxide (GO) with a hydrophilic organosilane, N-(trimethoxysilylpropyl) ethylenediaminetriacetic acid trisodium salt (TETA). The attachment of functional groups on the GO surface maintained the aqueous stability of the FG/Ag nanocomposite even after the hydrothermal reduction. Field emission scanning electron microscopy (FESEM) images illustrated a uniform distribution of Ag nanoparticles on the FG surface. The surface enhanced Raman spectroscopy (SERS) activity of the nanocomposite was investigated using p-aminothiophenol (p-ATP) and melamine which can be detected as low as 2 × 10−8 and 2 × 10−7 M, respectively. The impressive water stability and the high SERS sensitivity of the FG/Ag nanocomposite make it a suitable substrate for trace analysis of a variety of drugs, additives or organic contaminants in water. The nanocomposite also showed a positive inhibition effect against the growth of Escherichia coli bacteria, eliminating the possibility of bacterial contamination of the sensor, thus prolonging the shelf-life of the sensing device. Elsevier 2013 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/30022/1/Preparation%20of%20highly%20water%20dispersible%20functional%20graphene.pdf Kumar, S. Vijay and Huang, Nay Ming and Lim, Hong Ngee and Zainy, Mazlinda and Harrison, Ian and Chia, Chin Hua (2013) Preparation of highly water dispersible functional graphene/silver nanocomposite for the detection of melamine. Sensors and Actuators B: Chemical, 181. pp. 885-893. ISSN 0925-4005; ESSN: 1873-3077 10.1016/j.snb.2013.02.045
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description A stable aqueous suspension of a functional graphene/silver (FG/Ag) nanocomposite was prepared by an environmentally friendly hydrothermal method. The precursor, functional graphene oxide (FGO), was prepared by covalent functionalisation of graphene oxide (GO) with a hydrophilic organosilane, N-(trimethoxysilylpropyl) ethylenediaminetriacetic acid trisodium salt (TETA). The attachment of functional groups on the GO surface maintained the aqueous stability of the FG/Ag nanocomposite even after the hydrothermal reduction. Field emission scanning electron microscopy (FESEM) images illustrated a uniform distribution of Ag nanoparticles on the FG surface. The surface enhanced Raman spectroscopy (SERS) activity of the nanocomposite was investigated using p-aminothiophenol (p-ATP) and melamine which can be detected as low as 2 × 10−8 and 2 × 10−7 M, respectively. The impressive water stability and the high SERS sensitivity of the FG/Ag nanocomposite make it a suitable substrate for trace analysis of a variety of drugs, additives or organic contaminants in water. The nanocomposite also showed a positive inhibition effect against the growth of Escherichia coli bacteria, eliminating the possibility of bacterial contamination of the sensor, thus prolonging the shelf-life of the sensing device.
format Article
author Kumar, S. Vijay
Huang, Nay Ming
Lim, Hong Ngee
Zainy, Mazlinda
Harrison, Ian
Chia, Chin Hua
spellingShingle Kumar, S. Vijay
Huang, Nay Ming
Lim, Hong Ngee
Zainy, Mazlinda
Harrison, Ian
Chia, Chin Hua
Preparation of highly water dispersible functional graphene/silver nanocomposite for the detection of melamine
author_facet Kumar, S. Vijay
Huang, Nay Ming
Lim, Hong Ngee
Zainy, Mazlinda
Harrison, Ian
Chia, Chin Hua
author_sort Kumar, S. Vijay
title Preparation of highly water dispersible functional graphene/silver nanocomposite for the detection of melamine
title_short Preparation of highly water dispersible functional graphene/silver nanocomposite for the detection of melamine
title_full Preparation of highly water dispersible functional graphene/silver nanocomposite for the detection of melamine
title_fullStr Preparation of highly water dispersible functional graphene/silver nanocomposite for the detection of melamine
title_full_unstemmed Preparation of highly water dispersible functional graphene/silver nanocomposite for the detection of melamine
title_sort preparation of highly water dispersible functional graphene/silver nanocomposite for the detection of melamine
publisher Elsevier
publishDate 2013
url http://psasir.upm.edu.my/id/eprint/30022/1/Preparation%20of%20highly%20water%20dispersible%20functional%20graphene.pdf
http://psasir.upm.edu.my/id/eprint/30022/
_version_ 1643829933565280256
score 13.211869

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