| 基于碳纳米管修饰金电极的多巴胺电化学传感器 |
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| 引用本文： | 郑冬云,刘晓军,朱珊莹,曹汇敏,陈亚光,胡胜水.基于碳纳米管修饰金电极的多巴胺电化学传感器[J].传感器与微系统,2013(11):86-88. |
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| 作者姓名： | 郑冬云 刘晓军 朱珊莹 曹汇敏 陈亚光 胡胜水 |
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| 作者单位： | [1]中南民族大学生物医学工程学院,湖北武汉430074 [2]中南民族大学脑认知国家民委重点实验室,湖北武汉430074 [3]武汉大学化学与分子科学学院,湖北武汉430072 |
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| 基金项目： | 国家自然科学基金资助项目（31070885,61178087）;湖北省自然科学基金资助项目（BZY09010）;中南民族大学中央高校基本科研业务费专项资金资助项目（CTZl2001,CZQl2013,CZQl0003）;中南民族大学科研团队项目（XTZ09002） |
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| 摘 要： | 利用偶氮胭脂红B（ACB）对多壁碳纳米管（MWNTs）进行非共价修饰，使其具有水分散性，将MWNTs-ACB水分散液滴涂于金电极表面并置于红外灯下烤干，即制得多巴胺（DA）电化学传感器。伏安研究表明：MWNTs—ACB膜对生物小分子DA的电化学氧化具有良好的催化作用。最优的检测条件下，DA的检测线性范围为：1．0×10-6～1．0×10-mol／L，检出限低至5．0×10-7mol／L（S／N=3）。对传感器的性能进行了考察，结果表明：该DA传感器具有良好的稳定性和重现性，灵敏度高，选择性好。将传感器应用于注射液中DA含量的测定，结果令人满意。
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| 关 键 词： | 碳纳米管 偶氮胭脂红B 电极 多巴胺 电化学传感器 |
Electrochemical sensor of DA based on gold electrode modified with CNTs |
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| ZHENG Dong-yun LIU Xiao-jun ZHU Shan-ying CAO Hui-min CHEN Ya-guang,HU Sheng-shui.Electrochemical sensor of DA based on gold electrode modified with CNTs[J].Transducer and Microsystem Technology,2013(11):86-88. |
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| Authors: | ZHENG Dong-yun LIU Xiao-jun ZHU Shan-ying CAO Hui-min CHEN Ya-guang HU Sheng-shui |
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| Affiliation: | 1. College of Biomedical Engineering, South-Central University for Nationalities, Wuhan 430074, China; 2. Key Laboratory of Brain and Cognitive State Ethnic Affairs Commission, Wuhan 430074, China; 3. College of Chemistry and Molecule Science, Wuhan University, Wuhan 430072, China) |
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| Abstract: | Multi-walled carbon nanotubes （MWNTs） are noncovalently functionalized with azocarmine B （ ACB）, which make it has water dispersing ability. Dopamine electrochemical sensor is fabricated through dipping MWNTs-ACB water dispersion on gold electrode surface and dried under an infrared lamp. Voltammetric investigations indicate that the MWNTs-ACB film has good catalytic ability to the electrochemical oxidation of a small bio-molecule dopamine （DA）. Under optimal detecting conditions, a wide linear response over the DA concentration of 1.0 ×10 -6 ～ 1.0 × 10 -3 mol/L is obtained with a low detection limit of 5.0 x 10 -7 mol/L（ S/N = 3 ）. Properties of sensor are checked and results show that the DA sensor has good stability and reproducibility, high sensitivity and selectivity. The sensor is applied to deter＇ruination of DA in injection samples and results are satisfied. |
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| Keywords: | carbon nanotubes （CNTs） azocarmine B electrode dopamine （DA） electrochemical sensor |
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