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| 微过氧化物酶-11在碳纳米管/壳聚糖修饰电极上的直接电化学及电催化(英文) | |
| 引用本文： | 姜慧君,杜翀,李晓伟,杨辉,Daniel L.Akins.微过氧化物酶-11在碳纳米管/壳聚糖修饰电极上的直接电化学及电催化(英文)[J].功能材料与器件学报,2009,15(2). |
| 作者姓名： | 姜慧君 杜翀 李晓伟 杨辉 Daniel L.Akins |
| 作者单位： | 1. 中国科学院上海微系统与信息技术研究所,上海,200050;南京医科大学药学院,南京,210029 2. CASI and Department of Chemistry,The City College of The City University of New York,New York 10031,USA 3. 中国科学院上海微系统与信息技术研究所,上海,200050 |
| 基金项目： | the National Natural Science Foundation of China(No.20673136,20706056);;the National“863”High-Technology Research Program of China(2006AA05Z136,2007AA05Z141);;the 100 People Plan Program of the Chinese Academy of Sciences and the Pujiang Program of Shanghai City(No.06PJ14110) for support of this work |
| 摘 要： | 采用一步法于室温下有选择性地将小管径的单壁碳纳米管(SWCNTs)分散于生物相容性的聚合物--壳聚糖的水溶液中,并将其滴涂于玻碳电极表面,制备出微过氧化物酶-11(MP-11)修饰电极.循环伏安结果表明SWCNq、促进了MP-11在电极表面的直接电子传递,在pH=7.2的磷酸缓冲溶液中,MP-11的式电位为-0.36 V(vs.SCE),MP-11在电极表面的直接电子转移表观速率常数和覆盖度分别为78 s-1和8.76×10-10mol·cm-2.进一步的研究结果显示,固定在SWCNT表面的MP-11能保持其对氧气和过氧化氢还原的生物电催化活性,适合用作生物燃料电池的阴极和过氧化氢传感器.氧气在该修饰电极上的还原经历一个四电子过程;该过氧化氢生物传感器对过氧化氢还原的检测具有响应灵敏度高(响应时间小于4 S),检测线性范围为2.5×10-6～7.0×10-3vM,检测限为0.8 μM,相应的米氏常数和检测灵敏度分别为1.0 mM and 22.4μA/mM. |
| 关 键 词： | 微过氧化物酶-11 单壁碳纳米管 壳聚糖 直接电化学 电催化 |
Direct electrochemistry and electrocatalytic activity of microperoxidase-11 immobilized on chitosan wrapped single-walled carbon nanotubes |
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| JIANG Hui-jun,Philippe Mercier,Shiunchin C.Wang,DU Chong,LI Xiao-wei,YANG Hui,Daniel L.Akins.Direct electrochemistry and electrocatalytic activity of microperoxidase-11 immobilized on chitosan wrapped single-walled carbon nanotubes[J].Journal of Functional Materials and Devices,2009,15(2). | |
| Authors: | JIANG Hui-jun Philippe Mercier Shiunchin CWang DU Chong LI Xiao-wei YANG Hui Daniel LAkins |
| Affiliation: | 1.Shanghai Institute of Microsystem and Information Technology;Chinese Academy of Sciences;Shanghai 200050;China;2.School of Pharmacy;Nanjing Medical University;Nanjing 210029;3.CASI and Department of Chemistry;The City College of The City University of New York;New York 10031;USA |
| Abstract: | One-step aqueous dispersion and diameter-selective separation of HiPco single-walled carbon nanotubes(SWCNTs)has been accomplished through noncovalent complexation of the nanotubes with a water-soluble,biocompatible polymer chitosan(CHI)at room temperature."Smaller-diameter" SWCNTs are preferentially dispersed and wrapped by CHI in the aqueous supernatant that results following noncentrifuged precipitation,while "larger-diameter" SWCNTs exist in the precipitate.Such CHI wrapped small-diameter individual SWC... |
| Keywords: | microperoxidase - 11 single - walled carbon nanotube chitosan direct electrochemistry eleetrocatalysis |
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