多岛微电极中纳米线介电组装机理研究  

Study on the Mechanism of Nanowire Dielectric Assembly in Multi-island Microelectrodes

作　　者：丁海涛 司糈昊 刘潇锋 杨强 DING Haitao;SI Xuhao;LIU Xiaofeng;YANG Qiang(School of Mechanical and Electric Engineering,Changchun University of Scienceand Technology,Jilin Changchun 130000,China)

机构地区：[1]长春理工大学机电工程学院,吉林长春130000

出　　处：《河北师范大学学报（自然科学版）》2023年第3期251-258,共8页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金(51905047);吉林省教育厅资助项目(JJKH20200748KJ)。

摘　　要：为了探究多岛微电极中纳米线的介电组装机理,基于单岛微电极和双岛微电极分别设计了纳米线介电组装实验,并建立了相应的微电极组装数值模型,分析了电场分布、介电泳力、交流电热流对介电组装的影响及合力作用下纳米线的电动力学行为.双岛微电极的电场分布具有更强的奇异性,对纳米线介电组装更有利;在电场频率超过反转频率后,双岛微电极中电热流的流动方向开始发生反向,中间微间隙区域上方出现的对流旋涡能够将纳米线输送至微间隙组装区域,进一步阐明纳米线的组装行为是介电泳力与电热流共同作用形成的.To investigate the dielectric assembly mechanism of nanowires in multi-island microelectrodes,nanowire dielectric assembly experiments were designed based on single-island microelectrodes and double-island microelectrodes,respectively,and the corresponding numerical models of microelectrode assembly were establi-shed.The effect of the electric field distribution,dielectrophoretic force and AC heat flow on dielectric assembly,and the electrodynamic behavior of nanowires under combined forces were analyzed double-island microelectrodes have stronger singularity in electric field distribution,which is more favorable for nanowire dielectric assembly.When the electric field frequency exceeds the reversal frequency,the direction of electrothermal flow in the double-island microelectrodes begins to reverse,and the convective vortex that appears above the middle microgap region is able to transport the nanowires to the microgap assembly region.It is further clarified that the assembly behavior of nanowires is formed by the interaction of dielectrophoretic force and electrothermal flow.

关 键 词：多岛微电极 介电组装 反转频率 对流旋涡 纳米线 

分 类 号：TN305[电子电信—物理电子学]