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Jeong, Joonwoo
Experimental Soft Matter Physics Lab (SOPHY)
Research Interests
  • Liquid crystals, polymers, colloids, emulsions, pattern formation, microfluidics, microfabrication, optical microscopy

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Topography-guided buckling of swollen polymer bilayer films into three-dimensional structures

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Title
Topography-guided buckling of swollen polymer bilayer films into three-dimensional structures
Author
Jeong, JoonwooCho, YigilLee, Su YeonGong, XitingKamien, Randall D.Yang, ShuYodh, Arjun G.
Issue Date
2017-02
Publisher
ROYAL SOC CHEMISTRY
Citation
SOFT MATTER, v.13, no.5, pp.956 - 962
Abstract
Thin films that exhibit spatially heterogeneous swelling often buckle into the third dimension to minimize stress. These effects, in turn, offer a promising strategy to fabricate complex three-dimensional structures from two-dimensional sheets. Here we employ surface topography as a new means to guide buckling of swollen polymer bilayer films and thereby control the morphology of resulting three-dimensional objects. Topographic patterns are created on poly(dimethylsiloxane) (PDMS) films selectively coated with a thin layer of non-swelling parylene on different sides of the patterned films. After swelling in an organic solvent, various structures are formed, including half-pipes, helical tubules, and ribbons. We demonstrate these effects and introduce a simple geometric model that qualitatively captures the relationship between surface topography and the resulting swollen film morphologies. The model's limitations are also examined.
URI
https://scholarworks.unist.ac.kr/handle/201301/21372
URL
http://pubs.rsc.org/en/content/articlelanding/2017/sm/c6sm02299e#!divAbstract
DOI
10.1039/C6SM02299E
ISSN
1744-683X
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