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Conformal deposition of Pt on titania nanotubes to produce a bio-electrode for neuro-stimulating applications
Electrochemistry Communications ( IF 5.4 ) Pub Date : 2018-01-31 , DOI: 10.1016/j.elecom.2018.01.019
Yi-Jia Wu , Tsai-Wei Chung , Jun-Qian Huang , Pu-Wei Wu , Po-Chun Chen , Jyh-Fu Lee , Ting-Shan Chan

We develop an alkaline electroless bath for deposition of a conformal Pt layer 40 nm thick on titania nanotubes 800 nm long. The charge storage capacity (CSC) and electrochemically active surface area (ECSA) of this Pt-coated titania nanotube array have been studied to evaluate its potential as a bio-electrode for implantable bio-electronic devices. Images from electron microscopes confirm the formation of a uniform Pt film on both the internal and external surfaces of the nanotubes. The X-ray diffraction pattern indicates a preferred (111) orientation. Analysis from X-ray absorption spectroscopy on the plating bath suggests a reduction sequence of Pt4+ → Pt2+ → Pt. The Pt-coated titania nanotube array has large CSC and ECSA values, attributed to the hollow tubular nanostructure with a conformal Pt coating.



中文翻译:

Pt在二氧化钛纳米管上的保形沉积,以产生用于神经刺激应用的生物电极

我们开发了碱性化学镀液,用于在800 nm长的二氧化钛纳米管上沉积40 nm厚的保形Pt层。已经研究了这种涂覆Pt的二氧化钛纳米管阵列的电荷存储容量(CSC)和电化学活性表面积(ECSA),以评估其作为可植入生物电子设备的生物电极的潜力。来自电子显微镜的图像证实了在纳米管的内表面和外表面上均形成了均匀的Pt膜。X射线衍射图表明优选的(111)取向。镀浴的X射线吸收光谱分析表明Pt 4+  →Pt 2+的还原顺序 →铂 Pt涂层的二氧化钛纳米管阵列具有较大的CSC和ECSA值,这归因于带有共形Pt涂层的中空管状纳米结构。

更新日期:2018-01-31
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