Lakshmanan Shanmugamurthy, Kanwal Alokik, Liu Sheng, Patlolla Anitha, Iqbal Zafar, Mitra Somenath, Thomas Gordon A, Fagan Jeffrey A, Farrow Reginald C
Department of Physics, New Jersey Institute of Technology, University Heights, Newark, NJ 07102, USA.
Department of Chemistry and Environment Science, New Jersey Institute of Technology, University Heights, Newark, NJ 07102, USA.
Micromachines (Basel). 2020 Mar 20;11(3):324. doi: 10.3390/mi11030324.
Under certain conditions, electrophoretic deposition (EPD) of single-wall carbon nanotubes (SWCNTs) onto metal at the base of nanoscale insulating windows can result in a single SWCNT per window, bonded at one end to the metal. During EPD charge, buildup on the insulator creates electrostatic lenses at the windows that control the trajectory of the SWCNTs. The aim is to develop a reproducible process for deposition of individual vertically oriented SWCNTs into each window to enable novel devices. The length of the SWCNTs is shown to be the most critical parameter in achieving results that could be used for devices. In particular, single nanotube deposition in windows by EPD was achieved with SWCNTs with lengths on the order of the window depth. By performing current vs voltage (IV) measurements against a platinum wire in a phosphate buffer and by modeling the data, the presence of the nanotube can be detected, the contact interface can be studied, and the nanotube's viability for device applications can be determined. These results provide a basis for process integration of vertical SWCNTs using EPD.
在特定条件下，将单壁碳纳米管（SWCNTs）电泳沉积（EPD）到纳米级绝缘窗口底部的金属上，每个窗口可能会形成一根单壁碳纳米管，且一端与金属相连。在EPD充电过程中，绝缘体上的电荷积累会在窗口处形成静电透镜，从而控制单壁碳纳米管的轨迹。目标是开发一种可重复的工艺，将单个垂直取向的单壁碳纳米管沉积到每个窗口中，以制造新型器件。结果表明，单壁碳纳米管的长度是实现可用于器件的结果的最关键参数。特别是，当单壁碳纳米管的长度与窗口深度相当时，通过EPD实现了在窗口中沉积单个纳米管。通过在磷酸盐缓冲液中对铂丝进行电流与电压（IV）测量并对数据进行建模，可以检测到纳米管的存在，研究接触界面，并确定纳米管在器件应用中的可行性。这些结果为使用EPD进行垂直单壁碳纳米管的工艺集成提供了基础。
