| 纳米级金膜微电极的制作,表征及异相催化反应 |
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| 引用本文： | 蔡称心,陈洪渊.纳米级金膜微电极的制作,表征及异相催化反应[J].分析化学,1995,23(1):20-24. |
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| 作者姓名： | 蔡称心 陈洪渊 |
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| 作者单位： | 南京大学化学系 南京210093
(蔡称心，鞠熀先)，南京大学化学系 南京210093(陈洪渊) |
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| 基金项目： | 国家自然科学基金，青年基金 |
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| 摘 要： | 报道了纳米级金膜微电极的制作方法，用ＸＰＳ及ＳＥＭ对电极表面进行了表征，考察了该电极的循环伏安及计时电流特性，在聚吡咯修饰微带金电极上成功地实现了葡萄糖氧化酶和电子传递媒体Ｆｅ（ＣＮ）６＾３－的同时固定，并研究了ＧＯＤ／Ｆｅ（ＣＮ）６＾３－／ＰＰｙ微酶电极对葡萄糖的响应，稳态响应电流与葡萄糖浓度之间存在Ｍｉｃｈｅａｌｉｓ－Ｍｅｎｔｅｎ动力学特征。
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| 关 键 词： | 微电极 金膜 催化 葡萄糖氧化酶 纳米级 XPS SEM |
Fabrication and Characterization of Nanometer-sized Gold Electrode and Its Applications to Heterogeneous Catalytic Reactoins |
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| Cai Chengxin,Ju Huangxian,Chen Hongyuan.Fabrication and Characterization of Nanometer-sized Gold Electrode and Its Applications to Heterogeneous Catalytic Reactoins[J].Chinese Journal of Analytical Chemistry,1995,23(1):20-24. |
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| Authors: | Cai Chengxin Ju Huangxian Chen Hongyuan |
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| Abstract: | The nanometer-sized gold electrode is fabricated. The surface of the electrode is observed by X-ray photoelectron spectrum(XPS) and scan electron microscopy (SEM). The voltammetric characteristics of the electrode are studied by cyclic voltammetry and chronoamperometry, respectively. Simultaneous immobilization of glucose oxidase (GOD) and Fe(CN)6 3- as an electron mediator in polypyrrole (PPy) films was successfully accomplished at ultramicroband gold electrode to provide a simple biosensor capable of detecting glucose in a wide concentration range without oxygen as mediator in solution. The experimental results show that the relationship between the steady-state current of glucose at GOD/Fe (CN)6 3-/PPy electrode and the concentration of glucose is characterized by Michealis-Menten equation. |
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| Keywords: | Microelectrode ultramicroband gold electrode heterogeneous catalysis polypyrrole glucose oxidase |
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