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...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2013
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| Online Access: | http://psasir.upm.edu.my/id/eprint/30022/1/Preparation%20of%20highly%20water%20dispersible%20functional%20graphene.pdf |
| _version_ | 1825947625246949376 |
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| author | Kumar, S. Vijay Huang, Nay Ming Lim, Hong Ngee Zainy, Mazlinda Harrison, Ian Chia, Chin Hua |
| author_facet | Kumar, S. Vijay Huang, Nay Ming Lim, Hong Ngee Zainy, Mazlinda Harrison, Ian Chia, Chin Hua |
| author_sort | Kumar, S. Vijay |
| collection | UPM |
| 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. |
| first_indexed | 2024-03-06T08:16:15Z |
| format | Article |
| id | upm.eprints-30022 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T08:16:15Z |
| publishDate | 2013 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | 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 |
| 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 |
| title | 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_short | 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 |
| url | http://psasir.upm.edu.my/id/eprint/30022/1/Preparation%20of%20highly%20water%20dispersible%20functional%20graphene.pdf |
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