Reduction of edge effect on disk electrodes by optimized current waveform.
Reduction of edge effect on disk electrodes by optimized current waveform.
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通过优化电流波形减少圆盘电极上的边缘效应。
DOI：
10.1109/tbme.2014.2300860
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Weiland,JamesD
中科院分区：
文献类型：
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作者：
Wang,Boshuo;Petrossians,Artin;Weiland,JamesD
施加到圆盘电极的矩形脉冲导致圆盘边缘处的高电流密度，这可能导致电极腐蚀和组织损伤。我们探索了一种通过改变电流脉冲的前沿来降低电流密度和腐蚀的方法。使用有限元建模和数学分析来预测最佳波形，该最佳波形降低边缘处的电流密度，同时还保持短脉冲持续时间。实验上实现了优化波形的近似，并将其应用于铂盘电极。使用能量色散光谱的表面分析表明，脉冲后，这些电极的周边上的腐蚀显着减少，与控制矩形波形的脉冲相比。
Rectangular pulses applied to disk electrodes result in high current density at the edges of the disk, which can lead to electrode corrosion and tissue damage. We explored a method for reducing current density and corrosion, by varying the leading edge of the current pulse. Finite-element modeling and mathematical analysis were used to predict an optimal waveform that reduces current density at the edge while also maintaining short pulse duration. An approximation of the optimized waveform was implemented experimentally and applied to platinum disk electrodes. Surface analysis using energy-dispersive spectroscopy showed significant reduction of corrosion on the periphery of these electrodes after pulsing, compared to those pulsed with the control rectangular waveform.