Journal
SURFACE REVIEW AND LETTERS
Volume 16, Issue 6, Pages 929-933Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218625X09013505
Keywords
Buckling; protrusion; shape-memory polymer; shape recovery; wrinkles
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Funding
- A*STAR SERC [092 137 0016]
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We demonstrate a simple and cost-effective approach to realize two combined surface features of different scales together, namely submillimeter-sized protrusion array and microwrinkles, atop a polystyrene shape-memory polymer. Two different types of protrusions, namely flat-top protrusion and crown-shaped protrusion, were studied. The array of protrusions was produced by the Indentation-Polishing-Heating (IPH) process. Compactly packed steel balls were used for making array of indents. A thin gold layer was sputter deposited atop the polymer surface right after polishing. After heating for shape recovery, array of protrusions with wrinkles on the top due to the buckling of gold layer was produced.
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