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Open AccessArticle

Generation and Transport of Dielectric Droplets along Microchannels by Corona Discharge

1
Institute of Technological Sciences, Wuhan University, Wuhan 430072, China
2
School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
3
Department of Mechanical and Electronic Engineering, Changsha University, Changsha 410083, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to work.
Micromachines 2020, 11(2), 181; https://doi.org/10.3390/mi11020181
Received: 8 January 2020 / Revised: 6 February 2020 / Accepted: 7 February 2020 / Published: 10 February 2020
(This article belongs to the Special Issue Electrokinetics in Micro-/nanofluidic Devices)
In this paper, a phenomenon of generation and transport of droplets is proposed, which is based on the dielectric liquid electroconvection induced by corona discharge. We placed the dielectric fluid on a conductive/nonconductive substrate, and then it broke apart to become many small droplets that move along the conductive microchannel. The behaviors of dielectric droplets were experimentally observed on different conductive microchannels in details. Spreading speeds and sizes of dielectric droplets were analyzed at different driving voltages and conductive microchannels. This work highlights a simple approach to produce and manipulate dielectric droplets along microchannels.
Keywords: corona discharge; microfluidic; microchannel; electroconvection corona discharge; microfluidic; microchannel; electroconvection
MDPI and ACS Style

Tang, Q.; Zhou, S.; Hu, R.; Zheng, H.; Pan, J.; Tang, J. Generation and Transport of Dielectric Droplets along Microchannels by Corona Discharge. Micromachines 2020, 11, 181.

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