Porosification of surface of platinum electrode by anisotropic etching

Yasuo Terasawa, Hiroyuki Tashiro, Yukari Nakano, Jun Ohta

Research output: Contribution to journalArticle

Abstract

In neural prosthetics, stimulation electrodes are one of the most important components for stimulating neural tissue. It is known that the surface roughening of stimulation electrodes can improve their performance. In this study, we describe a method of producing platinum electrodes with a porous surface by anisotropic etching. Anisotropic etching was achieved by applying a DC voltage to a platinum electrode in physiological saline. The charge injection capacity Qinj almost doubled after etching, compared with that before etching. Furthermore, continuous current pulsing to the porous electrode in phosphate-buffered physiological saline for four months did not show any apparent deterioration in surface morphology or electrochemical properties, suggesting that the proposed porosification method improves the performance of stimulation electrodes.

Original languageEnglish
Pages (from-to)1957-1971
Number of pages15
JournalSensors and Materials
Volume31
Issue number6
DOIs
Publication statusPublished - Jan 1 2019

Fingerprint

Anisotropic etching
Platinum
platinum
etching
Electrodes
electrodes
stimulation
Etching
Charge injection
Prosthetics
Electrochemical properties
deterioration
Surface morphology
Deterioration
phosphates
Phosphates
direct current
Tissue
injection
Electric potential

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Materials Science(all)

Cite this

Porosification of surface of platinum electrode by anisotropic etching. / Terasawa, Yasuo; Tashiro, Hiroyuki; Nakano, Yukari; Ohta, Jun.

In: Sensors and Materials, Vol. 31, No. 6, 01.01.2019, p. 1957-1971.

Research output: Contribution to journalArticle

Terasawa, Yasuo ; Tashiro, Hiroyuki ; Nakano, Yukari ; Ohta, Jun. / Porosification of surface of platinum electrode by anisotropic etching. In: Sensors and Materials. 2019 ; Vol. 31, No. 6. pp. 1957-1971.
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