Charge injection capacity of TiN electrodes for an extended voltage range.
Charge injection capacity of TiN electrodes for an extended voltage range.
复制标题
TiN 电极的电荷注入能力可扩展电压范围。
DOI：
10.1109/iembs.2006.260088
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Sahin,Mesut
中科院分区：
文献类型：
--
作者：
Patan,Mustafa;Shah,Tosha;Sahin,Mesut
Many applications of neural stimulation demand a high current density from the electrodes used for stimulus delivery. New materials have been searched that can provide such large current and charge densities where the traditional noble metal and capacitor electrodes are inadequate. Titanium nitride, which has been used in cardiac pacemaker leads for many years, is one of these materials recently considered for neural stimulation. In this short report, we investigated the charge injection capacity of TiN electrodes for an extended range of cathodic voltages. The injected charge increased first slowly as a function of the electrode voltage, and then at a faster rate beyond -1.6 V. The maximum charge was 4.45 mC/cm2(n=6) for a cathodic voltage peak of -3.0 V and a bias voltage of -0.8 V. There was no evidence of bubble generation under microscopic observation. The unrecoverable charges remained under 7% of the total injected charge for the largest cathodic voltage tested. These large values of charge injection capacity and relatively small unrecoverable charges warrant further investigation of the charge injection mechanism in TiN interfaces at this extended range of electrode voltages
