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Issue 5, 2017
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Topography-guided buckling of swollen polymer bilayer films into three-dimensional structures

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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.

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

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Publication details

The article was received on 10 Oct 2016, accepted on 23 Dec 2016 and first published on 04 Jan 2017


Article type: Paper
DOI: 10.1039/C6SM02299E
Citation: Soft Matter, 2017,13, 956-962
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    Topography-guided buckling of swollen polymer bilayer films into three-dimensional structures

    J. Jeong, Y. Cho, S. Y. Lee, X. Gong, R. D. Kamien, S. Yang and A. G. Yodh, Soft Matter, 2017, 13, 956
    DOI: 10.1039/C6SM02299E

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