Pressure-Driven Filling of Closed-End Microchannel: Realization of Comb-Shaped Transducers for Acoustofluidics

Wei Guo; Adrian J.T. Teo; Alfonso M. Gañán-Calvo; Chaolong Song; Nam Trung Nguyen; Heng Dong Xi; Say Hwa Tan

doi:10.1103/PhysRevApplied.10.054045

Pressure-Driven Filling of Closed-End Microchannel: Realization of Comb-Shaped Transducers for Acoustofluidics

Wei Guo, Adrian J.T. Teo, Alfonso M. Gañán-Calvo, Chaolong Song, Nam Trung Nguyen, Heng Dong Xi, Say Hwa Tan

School of Aeronautics

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

16 Scopus citations

Abstract

We demonstrate the complete filling of both deionized water (DI water) and liquid metal (eutectic gallium-indium, EGaIn) into closed-end microchannels driven by a constant pressure at the inlet. A mathematical model based on gas diffusion through a porous polydimethylsiloxane (PDMS) wall is developed to unveil the physical mechanism in the filling process. The proposed theoretical analysis based on our model agrees well with the experimental observations. We also successfully generate traveling surface acoustic waves by actuating interdigitated microchannels filled with EGaIn. Our work provides significant insights into the fabrication of liquid electrodes that can be used for various acustofluidics applications.

Original language	English
Article number	054045
Journal	Physical Review Applied
Volume	10
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevApplied.10.054045
State	Published - 20 Nov 2018

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10.1103/PhysRevApplied.10.054045

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abstract = "We demonstrate the complete filling of both deionized water (DI water) and liquid metal (eutectic gallium-indium, EGaIn) into closed-end microchannels driven by a constant pressure at the inlet. A mathematical model based on gas diffusion through a porous polydimethylsiloxane (PDMS) wall is developed to unveil the physical mechanism in the filling process. The proposed theoretical analysis based on our model agrees well with the experimental observations. We also successfully generate traveling surface acoustic waves by actuating interdigitated microchannels filled with EGaIn. Our work provides significant insights into the fabrication of liquid electrodes that can be used for various acustofluidics applications.",

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T2 - Realization of Comb-Shaped Transducers for Acoustofluidics

AU - Guo, Wei

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AU - Gañán-Calvo, Alfonso M.

AU - Song, Chaolong

AU - Nguyen, Nam Trung

AU - Xi, Heng Dong

AU - Tan, Say Hwa

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AB - We demonstrate the complete filling of both deionized water (DI water) and liquid metal (eutectic gallium-indium, EGaIn) into closed-end microchannels driven by a constant pressure at the inlet. A mathematical model based on gas diffusion through a porous polydimethylsiloxane (PDMS) wall is developed to unveil the physical mechanism in the filling process. The proposed theoretical analysis based on our model agrees well with the experimental observations. We also successfully generate traveling surface acoustic waves by actuating interdigitated microchannels filled with EGaIn. Our work provides significant insights into the fabrication of liquid electrodes that can be used for various acustofluidics applications.

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Pressure-Driven Filling of Closed-End Microchannel: Realization of Comb-Shaped Transducers for Acoustofluidics

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