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New synthesis of gold nanocorals using a diazonium compound,and their application to an electrochemiluminescent assay of hydrogen peroxide |
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| Authors: | Min Xu Wenjing Qi Ling Zhang Jianping Lai Aziz-ur-Rehman Saadat Majeed Guobao Xu |
| Institution: | 1. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China 2. University of the Chinese Academy of Sciences, No. 19A Yuquanlu, Beijing, 100049, China |
| Abstract: | The reaction of hydrogen tetracholoroaurate, sodium borohydride and the diazonium compound prepared from 4-aminobenzoic acid results in the formation of gold nanocorals (Au-NCs) for the first time. Scanning electron microscopy images and transmission electron microscopy images show that the Au-NCs are composed of nanowires with a diameter of 5.3 nm. A glassy carbon electrode modified with Au-NCs is found to trigger intense electrochemiluminescence of the luminol/H2O2 system at a potential of ?0.13 V. The effect was exploited to determine H2O2 in the 0.1 to 100 μM concentration range with a 30 nM detection limit. Gold nanocoral has been synthesized using diazonium salt chemistry for the first time. The Gold nanocoral-modified electrode show intense electrochemiluminescence at a low potential of ?0.13 V. |
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