Electrostatic instability of liquid droplets on MEMS-based pillared surfaces

Ki Young Song; Kenichi Morimoto; Yu Chung Chen; Yuji Suzuki

doi:10.1016/j.snb.2015.11.031

Electrostatic instability of liquid droplets on MEMS-based pillared surfaces

Ki Young Song^*, Kenichi Morimoto, Yu Chung Chen, Yuji Suzuki

^*Corresponding author for this work

The University of Tokyo

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

The electrostatic instability of the Cassie-state droplets for different pitches of pillared surfaces and various ion concentration of liquids has been investigated. MEMS-based pillar structures with well-defined geometrical parameters have been fabricated and wetting behaviors were characterized through systematic experiments. A mathematical model for estimating the critical voltage with which the Cassie-state liquid droplet collapses has been developed incorporating the pinning force and the surface tension under the electric field. The present model is found to be in good agreement with the experimental results, reproducing the electrostatic instability due to the pull-in of the liquid-air interface.

Original language	English
Pages (from-to)	492-497
Number of pages	6
Journal	Sensors and Actuators, B: Chemical
Volume	225
DOIs	https://doi.org/10.1016/j.snb.2015.11.031
Publication status	Published - 31 Mar 2016
Externally published	Yes

Keywords

Cassie-to-Wenzel transition
Electrostatic instability
Pillared surface
Superhydrophobicity

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10.1016/j.snb.2015.11.031

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title = "Electrostatic instability of liquid droplets on MEMS-based pillared surfaces",

abstract = "The electrostatic instability of the Cassie-state droplets for different pitches of pillared surfaces and various ion concentration of liquids has been investigated. MEMS-based pillar structures with well-defined geometrical parameters have been fabricated and wetting behaviors were characterized through systematic experiments. A mathematical model for estimating the critical voltage with which the Cassie-state liquid droplet collapses has been developed incorporating the pinning force and the surface tension under the electric field. The present model is found to be in good agreement with the experimental results, reproducing the electrostatic instability due to the pull-in of the liquid-air interface.",

keywords = "Cassie-to-Wenzel transition, Electrostatic instability, Pillared surface, Superhydrophobicity",

author = "Song, {Ki Young} and Kenichi Morimoto and Chen, {Yu Chung} and Yuji Suzuki",

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day = "31",

doi = "10.1016/j.snb.2015.11.031",

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T1 - Electrostatic instability of liquid droplets on MEMS-based pillared surfaces

AU - Song, Ki Young

AU - Morimoto, Kenichi

AU - Chen, Yu Chung

AU - Suzuki, Yuji

PY - 2016/3/31

Y1 - 2016/3/31

N2 - The electrostatic instability of the Cassie-state droplets for different pitches of pillared surfaces and various ion concentration of liquids has been investigated. MEMS-based pillar structures with well-defined geometrical parameters have been fabricated and wetting behaviors were characterized through systematic experiments. A mathematical model for estimating the critical voltage with which the Cassie-state liquid droplet collapses has been developed incorporating the pinning force and the surface tension under the electric field. The present model is found to be in good agreement with the experimental results, reproducing the electrostatic instability due to the pull-in of the liquid-air interface.

AB - The electrostatic instability of the Cassie-state droplets for different pitches of pillared surfaces and various ion concentration of liquids has been investigated. MEMS-based pillar structures with well-defined geometrical parameters have been fabricated and wetting behaviors were characterized through systematic experiments. A mathematical model for estimating the critical voltage with which the Cassie-state liquid droplet collapses has been developed incorporating the pinning force and the surface tension under the electric field. The present model is found to be in good agreement with the experimental results, reproducing the electrostatic instability due to the pull-in of the liquid-air interface.

KW - Cassie-to-Wenzel transition

KW - Electrostatic instability

KW - Pillared surface

KW - Superhydrophobicity

UR - http://www.scopus.com/inward/record.url?scp=84949591102&partnerID=8YFLogxK

U2 - 10.1016/j.snb.2015.11.031

DO - 10.1016/j.snb.2015.11.031

M3 - Article

AN - SCOPUS:84949591102

SN - 0925-4005

VL - 225

SP - 492

EP - 497

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

ER -

Electrostatic instability of liquid droplets on MEMS-based pillared surfaces

Abstract

Keywords

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