Trapping of a Single Microparticle Using AC Dielectrophoresis Forces in a Microfluidic Chip

Overview

Journal Micromachines (Basel)

Publisher MDPI

Date 2023 Jan 21

PMID 36677221

Authors

Yanjuan Wang

Ning Tong

Fengqi Li

Kai Zhao

Deguang Wang

Yijie Niu

Fengqiang Xu

Jiale Cheng

Junsheng Wang

Affiliations

Soon will be listed here.

Abstract

Precise trap and manipulation of individual cells is a prerequisite for single-cell analysis, which has a wide range of applications in biology, chemistry, medicine, and materials. Herein, a microfluidic trapping system with a 3D electrode based on AC dielectrophoresis (DEP) technology is proposed, which can achieve the precise trapping and release of specific microparticles. The 3D electrode consists of four rectangular stereoscopic electrodes with an acute angle near the trapping chamber. It is made of Ag-PDMS material, and is the same height as the channel, which ensures the uniform DEP force will be received in the whole channel space, ensuring a better trapping effect can be achieved. The numerical simulation was conducted in terms of electrode height, angle, and channel width. Based on the simulation results, an optimal chip structure was obtained. Then, the polystyrene particles with different diameters were used as the samples to verify the effectiveness of the designed trapping system. The findings of this research will contribute to the application of cell trapping and manipulation, as well as single-cell analysis.

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