| Electrochemical preparation and characterization of gold-polyaniline core-shell nanocomposites on highly oriented pyrolytic graphite |
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| 作者姓名： | 李年丰 ;雷霆 ;刘咏 ;贺跃辉 ;张阳德 |
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| 作者单位： | Xiangya Hospital,Central South University State Key Laboratory of Powder Metallurgy,Central South University |
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| 基金项目： | Project（50721003）supported by the Creative Research Group of National Natural Science Foundation of China; Project（50825102）supported by the National Science Fund for Distinguished Young Scholars,China |
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| 摘 要： | A simple electrochemical method for the in situ preparation of homogeneously dispersed gold-polyaniline core/shell nanocomposite particles with controlled size on the highly oriented pyrolytic graphite(HOPG)was demonstrated.The HOPG surface was modified preferentially by covalent bonding of a two-dimensional 4-aminophenyl monolayer employing diazonium chemistry.AuCl4 -ions were attached to the Ar-NH2 termination and reduced electrochemically.This results in the formation of Au nuclei that could be further grown into gold nanoparticles.The formation of polyaniline as the shell wrap of Au nanoparticle was established by localized electro-polymerization.These core-shell nanocomposites prepared were characterized by AFM and cyclic voltammetry.The results show that the gold-polyaniline core-shell composites on HOPG have a mean particle size of 100 nm in diameter and the polyaniline shell thickness is about 15 nm.
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| 关 键 词： | core-shell structure nanocomposites polyaniline gold nanoparticles highly oriented pyrolytic graphite(HOPG) |
| 收稿时间： | 27 November 2009 |
Electrochemical preparation and characterization of gold-polyaniline core-shell nanocomposites on highly oriented pyrolytic graphite |
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| LI Nian-feng,LEI Ting,LIU Yong,HE Yue-hui,ZHANG Yang-de.Electrochemical preparation and characterization of gold-polyaniline core-shell nanocomposites on highly oriented pyrolytic graphite[J].Transactions of Nonferrous Metals Society of China,2010,20(12):2314-2319. |
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| Authors: | LI Nian-feng LEI Ting LIU Yong HE Yue-hui ZHANG Yang-de |
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| Affiliation: | [1]Xiangya Hospital, Central South University, Changsha 410008, China; [2]State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China |
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| Abstract: | A simple electrochemical method for the in situ preparation of homogeneously dispersed gold-polyaniline core/shell nanocomposite particles with controlled size on the highly oriented pyrolytic graphite(HOPG)was demonstrated.The HOPG surface was modified preferentially by covalent bonding of a two-dimensional 4-aminophenyl monolayer employing diazonium chemistry.AuCl4 -ions were attached to the Ar-NH2 termination and reduced electrochemically.This results in the formation of Au nuclei that could be further grown into gold nanoparticles.The formation of polyaniline as the shell wrap of Au nanoparticle was established by localized electro-polymerization.These core-shell nanocomposites prepared were characterized by AFM and cyclic voltammetry.The results show that the gold-polyaniline core-shell composites on HOPG have a mean particle size of 100 nm in diameter and the polyaniline shell thickness is about 15 nm. |
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| Keywords: | core-shell structure nanocomposites polyaniline gold nanoparticles highly oriented pyrolytic graphite（HOPG） |
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