Journal of South China University of Technology(Natural Science Edition) ›› 2023, Vol. 51 ›› Issue (7): 42-51.doi: 10.12141/j.issn.1000-565X.220483

Special Issue: 2023年机械工程

• Mechanical Engineering • Previous Articles     Next Articles

Dielectric Behavior of Particles in Multi-Gap Serial Nanoelectrode System

DING Haitao LIU Xiaofeng ZHANG Jingran YANG Qiang SI Xuhao MA Tianci LIU Peng   

  1. College of Mechanical and Electric Engineering,Changchun University of Science and Technology,Changchun 130013,Jilin,China
  • Received:2022-08-01 Online:2023-07-25 Published:2023-02-08
  • Contact: 丁海涛(1979-),男,博士,讲师,主要从事微纳制造、图像识别研究。 E-mail:dhtding@163.com
  • About author:丁海涛(1979-),男,博士,讲师,主要从事微纳制造、图像识别研究。
  • Supported by:
    the National Natural Science Foundation of China(51905047)

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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