Activated iridium oxide films fabricated by asymmetric pulses for electrical neural microstimulation and recording

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• 作者：Yi Lu ; Zhengxu Cai ; Yuliang Cao ; Hanxi Yang ; Yanwen Y. Duan
• 关键词：Activated iridium oxide films (AIROFs) ; Microelectrode array ; Microstimulation ; Neural prostheses ; Brain– ; computer interface
• 刊名：Electrochemistry Communications
• 出版年：2008
• 出版时间：May 2008
• 年：2008
• 卷：10
• 期：5
• 页码：778-782
• 全文大小：536 K

文摘

An efficient and reliable electrochemical method for preparation of activated iridium oxide films (AIROFs) microelectrodes by applying an asymmetric pulse train in Na₂HPO₄ solution was reported. The AIROFs microelectrodes exhibited a very high safe charge injection (Q_inj) limit (4.1 mC/cm²), as well as excellent mechanical and electrochemical stability. Electrode impedance at 1 kHz has been significantly reduced by 92 % . All of these characteristics are greatly desired for electrical neural microstimulation and recording applications. In addition, the activation method can be easily incorporated into other fabrication processes such as micro electrical mechanical system (MEMS).