多间隙串行纳米电极系统内粒子的介电行为

丁海涛, 刘潇锋, 张景然, 等

doi:10.12141/j.issn.1000-565X.220483

华南理工大学学报(自然科学版) >

2023 , Vol. 51 >Issue 7: 42 - 51

DOI: https://doi.org/10.12141/j.issn.1000-565X.220483

机械工程

多间隙串行纳米电极系统内粒子的介电行为

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长春理工大学机电工程学院，吉林长春 130013

丁海涛（1979-），男，博士，讲师，主要从事微纳制造、图像识别研究。

收稿日期: 2022-08-01

网络出版日期: 2023-02-06

基金资助

国家自然科学基金资助项目(51905047);吉林省教育厅科学研究项目(JJKH20200748KJ)

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Dielectric Behavior of Particles in Multi-Gap Serial Nanoelectrode System

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College of Mechanical and Electric Engineering，Changchun University of Science and Technology，Changchun 130013，Jilin，China

丁海涛（1979-），男，博士，讲师，主要从事微纳制造、图像识别研究。

Received date: 2022-08-01

Online published: 2023-02-06

Supported by

the National Natural Science Foundation of China(51905047)

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摘要

为了探究金属纳米粒子在多导电元件微电路修复上的应用，分析纳米粒子介电串行组装过程中的运动趋势，基于一种多间隙纳米电极系统，研究处于非均匀电场内的纳米粒子的介电串行组装行为。首先，进行了导电岛微电极系统的粒子介电组装实验，发现组装获得的熔融态纳米粒子线能够增强电路的导电能力。然后，针对双间隙与多间隙串行纳米电极系统进行了介电串行组装对比实验，发现随着系统内导电元件数量的增加，纳米间隙均存在体组装现象，实现了多间隙串行纳米电极系统内的导电元件连接。最后，通过电场分布及介电组装过程中纳米粒子所受介电泳力、交流电热流以及二者合力的仿真分析发现：在频率为150 kHz的条件下，相比纳米间隙外部，间隙内部的介电泳力及交流电热流流速平均值更高；而且，在多间隙串行纳米电极系统任意间隙内均会出现纳米流体泵现象，且不受间隙数量的影响。纳米流体泵现象表明，处于非均匀电场内的金属纳米粒子在介电串行组装过程中具有体组装与面组装的趋势，此类组装趋势能够直接影响纳米粒子线的生成质量。

关键词： 多间隙串行纳米电极系统; 导电岛; 介电行为; 交流电热流

本文引用格式

丁海涛, 刘潇锋, 张景然, 等 . 多间隙串行纳米电极系统内粒子的介电行为[J]. 华南理工大学学报(自然科学版), 2023 , 51(7) : 42 -51 . DOI: 10.12141/j.issn.1000-565X.220483

Abstract

In order to explore the application of metal nanoparticles to the repair of microcircuits with multi-conducting elements and to analyze the motion trends during the dielectric serial assembly of nanoparticles, the dielectrophoretic serial assembly behavior of nanoparticles in a non-uniform electric field is investigated based on a multi-gap nanoelectrode system. In the investigation, first, the particle dielectrophoretic assembly experiments of the conductive island microelectrode system were conducted, finding that the molten nanoparticle wires obtained from the assembly could enhance the circuit conductivity. Then, a comparative experiment of dielectrophoretic serial assembly was conducted for the double-gap and the multi-gap serial nanoelectrode systems, finding that, with the increase of the number of conducting islands in the system, a body assembly phenomenon occurs in all nano-gaps, which helps realize the connection of conducting elements within the multi-gap serial nanoelectrode system. Finally, a simulation analysis was carried out not only for the electric field distribution but also for the dielectrophoretic force, alternating current electrothermal flow and their combined force during the dielectrophoretic assembly of nanoparticles. The results show that the average values of the dielectrophoretic force and the alternating current electrothermal flow inside the gap are both higher than those outside the gap at a frequency of 150 kHz; and that nanofluid pumping occurs in any gap of the multi-gap serial nanoelectrode system and the nanofluid pumping is not affected by the number of gaps. Moreover, the emergence of nanofluidic pumps indicates that metal nanoparticles in non-uniform electric field have an tendency of bulk and surface assembly during the dielectric serial assembly, and this tendency may directly affect the quality of generated nanoparticle wires.

Key words： multi-gap serial nanoelectrode system; conductive island; dielectric behavior; alternating current electrothermal flow

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