Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 10, Issue 5, Pages 778-782Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2008.02.013
Keywords
activated iridium oxide films (AIROFs); microelectrode array; microstimulation; neural prostheses; brain-computer interface
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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 (similar to 4.1 mC/cm(2)), as well as excellent mechanical and electrochemical stability. Electrode impedance at 1 kHz has been significantly reduced by similar to 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). (C) 2008 Published by Elsevier B.V.
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