期刊
SOFT MATTER
卷 13, 期 5, 页码 956-962出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6sm02299e
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资金
- National Science Foundation [DMR-1205463, DMR-1262047, DMR1120901]
- Emerging Frontiers in Research and Innovation-Origami Design for Integration of Self- Assembling Systems for Engineering Innovation (NSF/EFRI-ODISSEI) [EFRI 13-31583]
- NASA [NNX08AO0G]
- Korean Government [NRF-2015R1A2A2A01007613, IBS-R020-D1]
- Simons Investigator grant from the Simons Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1607378] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1262047, 1410253] Funding Source: National Science Foundation
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.
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