標題: Electrochemical Evaluation of Geometrical Effect and Three-dimensionalized Effect of Iridium Oxide Electrodes Used for Retinal Stimulation
作者: Noda, Toshihiko
Noda, Yoshiko
Chen, Po-Chun
Haruta, Makito
Sasagawa, Kiyotaka
Tokuda, Takashi
Wu, Chung-Yu
Ohta, Jun
電機學院
College of Electrical and Computer Engineering
關鍵字: retinal prosthesis;neural stimulation;stimulus electrode;three-dimensionalized electrode;iridium oxide
公開日期: 1-Jan-2018
摘要: The geometry dependence and three-dimensionalized effect of the electrochemical properties of iridium oxide electrodes used in retinal prosthesis are discussed herein. Planar electrodes with various geometries were fabricated. Three-dimensionalized electrodes with microfabricated resin cores were also fabricated. The charge storage capacity (CSC) and charge injection capacity (CIC), both of which are important properties for neural stimulation, were quantitatively evaluated. This evaluation showed the important electrode property that the surface area dominantly affects the CSC. On the other hand, the CIC was not proportionally related to the electrode area, confirming that the edge region of the electrodes is significant in the mechanism of action. Moreover, performance enhancement with a three-dimensionalized electrode was clearly confirmed. The fundamental properties of highly effective stimulus electrodes were successfully evaluated and a detailed discussion is presented.
URI: http://dx.doi.org/10.18494/SAM.2018.1717
http://hdl.handle.net/11536/144933
ISSN: 0914-4935
DOI: 10.18494/SAM.2018.1717
期刊: SENSORS AND MATERIALS
Volume: 30
起始頁: 213
結束頁: 224
Appears in Collections:Articles