碳纳米管可控介电泳参数模拟研究

发布时间：2018-05-19 19:27

本文选题：电极形状 + 电极间距与碳纳米管长度之比　；参考：《传感技术学报》2017年06期

【摘要】：碳纳米管的结构以及微电极的物性参数是微纳器件制备过程中影响介电泳效率与精度的重要因素。微电极形状和电极间距与碳纳米管长度之比(λ)是两个与器件制造成本紧密相关的可控介电泳参数。本文根据有限元方法,研究了这两个参数对于介电泳力的影响规律。通过对3种电极下的碳纳米管介电泳速度进行归一化处理,结果表明碳纳米管在分散液中的介电泳速度受电极形状影响较小。而相比于电极形状,λ对介电泳力的影响更加显著。虽然电极间距越小越有利于碳纳米管的组装,但是考虑微电极加工难度与成本,认为λ在0.5~1.0为碳纳米管组装的优化区间。根据介电泳组装实验需要,给出了溶液阈值浓度修正表达式。本研究对于提高介电泳组装效率和实验精度具有一定的理论指导意义。
[Abstract]:The structure of carbon nanotubes (CNTs) and the physical parameters of microelectrodes are important factors affecting the efficiency and accuracy of dielectric electrophoresis. Microelectrode shape and the ratio of electrode spacing to carbon nanotube length (位) are two controllable dielectric electrophoretic parameters which are closely related to the fabrication cost of the device. Based on the finite element method, the influence of these two parameters on the dielectric electrophoretic force is studied in this paper. The results show that the dielectric electrophoretic rate of carbon nanotubes in the dispersions is less affected by the electrode shape through the normalization treatment of the dielectric electrophoresis rate of carbon nanotubes under three kinds of electrodes. Compared with the electrode shape, 位 has a more significant effect on the dielectric electrophoresis force. Although the smaller the electrode spacing is, the better the assembly of carbon nanotubes is, but considering the difficulty and cost of microelectrode fabrication, it is considered that 位 is the optimal range of carbon nanotubes assembly at 0.5 渭 m 1.0. According to the needs of the dielectric electrophoresis assembly experiment, the modified expression of solution threshold concentration is given. This study is of theoretical significance for improving the assembly efficiency and experimental accuracy of dielectric electrophoresis.
【作者单位】：太原理工大学信息工程学院微纳系统研究中心;新型传感器与智能控制教育部与山西省重点实验室;高端煤矿机械装备协同创新中心;
【基金】：山西省基础研究计划项目(2015021092) 国家863项目(2015AA042601) 国家自然科学基金重点支持项目(61471255,61474079)
【分类号】：TB383.1;TQ127.11

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