Local Wrinkle Patterning with Controlled Morphologies on a Membrane

Tailoring microscale wrinkle patterns is of great importance in diverse surface applications where wetting behavior, optical phenomena, adhesion control, and other factors need to be optimized. Here, we report a local-out-of-plane stretching (LOPS) method for simultaneously generating diverse wavy p...

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Published inInternational journal of precision engineering and manufacturing Vol. 20; no. 8; pp. 1415 - 1421
Main Authors Li, Xin, Park, Sang-Hu
Format Journal Article
LanguageEnglish
Published Seoul Korean Society for Precision Engineering 01.08.2019
Springer Nature B.V
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ISSN2234-7593
2005-4602
DOI10.1007/s12541-019-00146-5

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Summary:Tailoring microscale wrinkle patterns is of great importance in diverse surface applications where wetting behavior, optical phenomena, adhesion control, and other factors need to be optimized. Here, we report a local-out-of-plane stretching (LOPS) method for simultaneously generating diverse wavy patterns like labyrinthine, wavy, and straight lines. Multi-step LOPS was introduced on a UV-curable thin-resin-layered membrane with various types of punches, realizing a designed pattern with microscale wrinkles based on elastic instabilities. We illustrate that the wrinkling morphologies can be controlled simply by changing the punch shape and number of strokes. Experiments and numerical simulations were done to understand the wrinkling mechanism of LOPS. The results provide insights into the control of local wettability using topographical, tunable wrinkling patterns applicable to biochips, microfluidic devices, and flexible electronics.
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ISSN:2234-7593
2005-4602
DOI:10.1007/s12541-019-00146-5