期刊
CERAMICS INTERNATIONAL
卷 47, 期 6, 页码 7593-7601出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2020.11.098
关键词
Polymer-derived ceramic; Stimulation electrode; Electrochemical characterization; Pacemaker electrode
资金
- initiative of the ETH board through the Strategic Focus Area (SFA) - Advanced Manufacturing programme (project Ceramic X.0 - High-precision micro-manufacturing of ceramics), Switzerland
The electrochemical behavior of polymer-derived silicon oxycarbide (SiOC) and titanium-doped SiOC (SiTiOC) ceramic electrodes for use as pacemaker electrodes was investigated. Results showed that the SiOC and SiTiOC electrodes displayed wide electrochemical stability and had potential as candidate materials for next-generation pacemaker electrodes.
In an implantable electrode, such as a pacemaker electrode, fibrotic tissue formation due to a foreign body reaction is an important challenge affecting the efficiency to transmit the electrical signal of the device. The chemical inertness, biocompatibility, and electrical conductivity of polymer-derived ceramics (PDCs) are promising features in terms of overcoming this challenge. Here, the electrochemical behavior of polymer-derived silicon oxycarbide (SiOC) and titanium-doped SiOC (SiTiOC) ceramic electrodes for use as pacemaker electrodes is investigated by measuring impedance spectroscopy and cyclic voltammetry. In addition, typical stimulation electrodes such as iridium oxide, titanium nitride, platinum, and glassy carbon were prepared and loaded simultaneously into a custom-made electrochemical testing platform for comparison with SiOC and SiTiOC electrodes under identical conditions. The SiOC and SiTiOC electrodes shows a wide electrochemical stability window in the range of -0.9 to 1.2 V with a double layer capacitance as the charge injection mechanism at the electrode/phosphate-buffered saline interface. Also, analyzing the voltage transient shows that the maximum charge injection of the SiTiOC electrode was about 28 mu C/cm(2). The results of the electrochemical evaluation and comparison of SiOC and SiTiOC stimulating electrodes will be helpful to understand fundamental characteristics for the potential of this material as candidate for next-generation pacemaker electrodes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据