Issue 16, 2013
From the journal:

Soft Matter

Thermoresponsive switching of liquid flow direction on a two-face prism array†

Sang Moon Kim,‡a   Do Hyun Kang,‡a   Jai Hyun Koh,b   Hyo Seon Suh,b   Hyunsik Yoon,*c   Kahp-Yang Suh*a  and  Kookheon Char*b  

* Corresponding authors

a School of Mechanical and Aerospace Engineering, The WCU Program for Multiscale Mechanical Design, Seoul National University, Seoul, Korea
E-mail: sky4u@snu.ac.kr
Fax: +82-2-884-1594
Tel: +82-2-884-1597

b The National Initiative Creative Research Center for Intelligent Hybrids, The World Class University Program for Chemical Convergence for Energy and Environment, School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744, Korea
E-mail: khchar@plaza.snu.ac.kr
Fax: +82-2-873-7523
Tel: +82-2-880-7431

c Department of Chemical and Biomolecular Engineering, Seoul National University of Science & Technology, Seoul 139-743, Korea
E-mail: hsyoon@seoultech.ac.kr
Fax: +82-2-977-8717
Tel: +82-2-970-6607

Abstract

We present a simple approach to reversibly switch the direction of liquid flow on physically symmetric and chemically asymmetric prism structures by exploiting the reversibility of surface wetting properties of a thermo-responsive polymer, poly(N-isopropyl-acrylamide). Such an asymmetric prism array creates a flow path in the direction of the lower critical contact angle. This allows a unidirectional “step flow” across the ridges of prism channels, which can be made reversible with a suitable temperature change.

Graphical abstract: Thermoresponsive switching of liquid flow direction on a two-face prism array

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Article information

DOI
https://doi.org/10.1039/C3SM27901D
Article type
Communication
Submitted
19 Dec 2012
Accepted
06 Feb 2013
First published
21 Feb 2013

Soft Matter, 2013,9, 4145-4149

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Thermoresponsive switching of liquid flow direction on a two-face prism array

S. M. Kim, D. H. Kang, J. H. Koh, H. S. Suh, H. Yoon, K. Suh and K. Char, Soft Matter, 2013, 9, 4145 DOI: 10.1039/C3SM27901D

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