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Liquid Transport in Bio-Inspired Capillary-Driven Open-Air Channels

Published online by Cambridge University Press:  23 January 2017

Koji Muto ,
Shuto Ito  and
Daisuke Ishii
Koji Muto
Affiliation:
Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi, 466-8555, Japan
Shuto Ito
Affiliation:
Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi, 466-8555, Japan
Daisuke Ishii*
Affiliation:
Department of Life Science and Applied Chemistry, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi, 466-8555, Japan
*
*(Email: ishii.daisuke@nitech.ac.jp)
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Abstract

We fabricated a novel open-air channel with high efficient capillary-driven system inspired by a coastal animal “wharf roach”. The animal has open-air channels on its legs to transport water spontaneously using by capillary force. We abstracted principles controlling this phenomenon and applied it to artificial open-air channels, aiming at manipulating liquids without external energies. After surface modification for high surface free energy, the inspired open-air channels were able to transport water against gravity as well as the open-air channels of wharf roach by capillary effect of surface microstructures and chemistries. Topographical variation in micrometer-scaled patterns induced transport velocities improvement due to the enhancement of spreading intervals between the microstructure and wettability. Considering topography of micropatterned surfaces, the open-air channels with controllable transport velocity are applicable to capillary-driven microfluidics and lab-on-a-chips.

Keywords

biomimetic (assembly)microstructurefluidics
Type
Articles
Information
MRS Advances , Volume 2 , Issue 19-20: Biomaterials and Soft Materials , 2017 , pp. 1111 - 1116
Copyright
Copyright © Materials Research Society 2017 

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References

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