Manipulation of Micro-objects Using Acoustically Oscillating Bubbles Based on the Gas Permeability of PDMS

Overview

Journal Biomicrofluidics

Publisher American Institute of Physics

Specialty Biomedical Engineering

Date 2018 Jun 26

PMID 29937951

Citations 3

Authors

Bendong Liu

Baohua Tian

Xu Yang

Mohan Li

Jiahui Yang

Desheng Li

Kwang W Oh

Affiliations

Soon will be listed here.

Abstract

This paper presents a novel manipulation method for micro-objects using acoustically oscillating bubbles with a controllable position based on the gas permeability of polydimethylsiloxane. The oscillating bubble trapped within the side channel attracts the neighboring micro-objects, and the position of the air-liquid interface is controlled by generating temporary pressure difference between the side channel and the air channel. To demonstrate the feasibility of the method in technological applications, polystyrene microparticles of 10 m in diameter were successfully captured, transported, and released. The influence of pressure difference on the movement speed of the air-liquid interface was demonstrated in our experiments, and the manipulation performance was also characterized by varying the frequency of the acoustic excitation and the pressure difference. Since the bubble generation and the air-liquid interface movement in our manipulation method do not need any electrochemical reaction and any high temperature, this on-chip manipulation method provides a controllable, efficient, and noninvasive tool for handling micro-objects such as particles, cells, and other entities. The whole manipulation process, including capturing, transporting, and releasing of particles, spent less than 1 min. It can be used to select the cells and particles in the microfluidic device or change the cell culture medium.

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