Topography-guided buckling of swollen polymer bilayer films into three-dimensional structures
| Autor: | Randall D. Kamien, Arjun G. Yodh, Yigil Cho, Xiting Gong, Joonwoo Jeong, Shu Yang, Su Yeon Lee |
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| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Materials science Morphology (linguistics) Bilayer Nanotechnology 02 engineering and technology General Chemistry Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Stress (mechanics) chemistry.chemical_compound Buckling chemistry Parylene medicine Thin film Composite material Swelling medicine.symptom 0210 nano-technology |
| Zdroj: | Soft Matter. 13:956-962 |
| ISSN: | 1744-6848 1744-683X |
| DOI: | 10.1039/c6sm02299e |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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