Author/Editor		Mehle, Andraž; Rozman, Janez; Šala, Martin; Ribarič, Samo; Pečlin, Polona
Title		Surface characterization of platinum stimulating electrodes using an electrochemical scanning method
Translated title		Karakterizacija površine platinastih stimulacijskih elektrod s pomočjo elektrokemijske vrstične metode
Type		članek
Vol. and No.		Letnik 51, št. 6
Publication year		2017
Volume		str. 981-988
Language		eng
Abstract		The purpose of this article is to investigate the electrochemical performance of platinum stimulating nerve electrodes (WE1 and WE2) with different surface structures to define which one is able to produce a higher neural activation function during nerve stimulation than that achieved by conventional electrodes. The purpose is also to present a method that enables the electrochemical scanning of stimulating electrode surfaces. The surface of WE1 was modified using rough sand paper, while the surface of WE2 was modified using fine sand paper. The potential at the different roughened surfaces in the sodium phosphate mixture, when excited with specific current pulses, was measured against a Ag/AgCl reference electrode. Voltage transients were recorded to determine the polarization across the electrode-electrolyte interface. The results indicate that the surface of WE1 could deliver more current to the nerve tissue and more activation for a fixed input voltage than WE2. Namely, it is shown that the mean |Zpol| of WE1 was lower than that for WE2 (237.1 vs. 251 ). Accordingly, the platinum electrode that was superficially modified using rough sand paper is more suitable for safe and efficient nerve stimulation than the electrode that was superficially modified using fine sand paper.
Keywords		platinum polarization interfaces platina polarizacija prehodi