聚苯胺-二氧化锰涂层的电化学合成及其对神经微电极界面性能的影响  

Electrochemically Synthesized PANI-MnO_2 Coatings and Their Effect on Interface Properties of Neural Microelectrode

作　　者：张文光[1] 吴栋栋[1] 李正伟[1] 罗云[1] 

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240

出　　处：《上海交通大学学报》2014年第2期199-204,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金项目资助(51175334);机械系统与振动国家重点实验室自主课题(MSVZD201110)

摘　　要：提出了一种简易、低成本的方法进行神经微电极的性能改进,以改善神经电极/神经组织的界面特性.采用电化学方法合成导电聚合物聚苯胺PANI和PANI-MnO2复合涂层,对神经微电极位点进行表面修饰;对修饰电极的表面形貌与电学性能进行测试,对比分析了MnO2掺杂对PANI涂层的影响.结果表明:MnO2掺杂改善了PANI涂层的表面形貌;与PANI修饰电极相比,PANI-MnO2修饰电极界面通过的电荷量提高了近7倍,电学性能稳定性更好,在神经信号相关的1kHz频率处阻抗降低到原来的1/6,PANI-MnO2复合涂层能更好地提高电极的电学性能.In this paper, a simple and low-cost method for improving the performance of neural microelectrodes was reported. The electrochemical polymerization of conducting polymer PANI and PANI-MnO2 were performed to modify the surface of the microelectrode sites, and the morphology and electrical properties of the coated microelectrodes were investigated to analysize the influence of MnO2 doping on the PANI coating. The result showed that the surface morphology of the PANI coating was improved by MnO2 doping. Compared to the electrode with PANI, the charge injection capacity of the electrode with PANI MnO2 increased by about 7 fold and the impedance decreased to the original 1/6 （@ 1 kHz）. The electrical properties was more stable and excellent with PANI-MnO2 coating.

关 键 词：神经微电极 导电聚合物 聚苯胺 二氧化锰 表面修饰 

分 类 号：R318[医药卫生—生物医学工程] O646[医药卫生—基础医学]