Guided Healing of Damaged Microelectrodes via Electrokinetic Assembly of Conductive Carbon Nanotube Bridges.
Guided Healing of Damaged Microelectrodes via Electrokinetic Assembly of Conductive Carbon Nanotube Bridges.
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DOI：
10.3390/mi12040405
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发表时间：
2021-04-06
期刊：
影响因子：
3.4
通讯作者：
Kulinsky L
中科院分区：
文献类型：
--
作者：
Zhou T;Michaels M;Kulinsky L
随着现代设备中集成电路、能量存储技术和传感器的使用增加，受损微电极的愈合和修复的主题已经变得特别有趣。随着电极的尺寸随着现代电子设备中所有元件的小型化一起缩小，存在电极的机械、热或化学诱导断裂的更大风险。在这项研究中，提出了一种新的方法电极愈合电动组装碳纳米管（CNT）桥。利用先前描述的逐步CNT沉积工艺，跨越越来越大的电极间隙组装导电桥，其中电极间隙的宽度范围从20微米到远超过170微米。这项工作代表了一个重要的里程碑，因为以前报道的最长的导电CNT桥的长度为75微米。为了固定所产生的导电CNT桥，它们用电沉积的聚吡咯（一种导电聚合物）层固定。所得到的碳纳米管桥的电阻，其依赖于电极间隙的大小，进行评估和解释。通过导电CNT桥连接电极可以找到从纳米电子学到神经科学和组织工程的许多应用。
The subject of healing and repair of damaged microelectrodes has become of particular interest as the use of integrated circuits, energy storage technologies, and sensors within modern devices has increased. As the dimensions of the electrodes shrink together with miniaturization of all the elements in modern electronic devices, there is a greater risk of mechanical-, thermal-, or chemical-induced fracture of the electrodes. In this research, a novel method of electrode healing using electrokinetically assembled carbon nanotube (CNT) bridges is presented. Utilizing the previously described step-wise CNT deposition process, conductive bridges were assembled across ever-larger electrode gaps, with the width of electrode gaps ranging from 20 microns to well over 170 microns. This work represents a significant milestone since the longest electrically conductive CNT bridge previously reported had a length of 75 microns. To secure the created conductive CNT bridges, they are fixed with a layer of electrodeposited polypyrrole (a conductive polymer). The resistance of the resulting CNT bridges, and its dependence on the size of the electrode gap, is evaluated and explained. Connecting electrodes via conductive CNT bridges can find many applications from nanoelectronics to neuroscience and tissue engineering.
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