Abstract
This paper describes how a memory-based, sequential wrinkling process can transform flat polystyrene sheets into multiscale, three-dimensional hierarchical textures. Multiple cycles of plasma-mediated skin growth followed by directional strain relief of the substrate resulted in hierarchical architectures with characteristic generational (G) features. Independent control over wrinkle wavelength and wrinkle orientation for each G was achieved by tuning plasma treatment time and strain-relief direction for each cycle. Lotus-type superhydrophobicity was demonstrated on three-dimensional G1-G2-G3 hierarchical wrinkles as well as tunable superhydrophilicity on these same substrates after oxygen plasma. This materials system provides a general approach for nanomanufacturing based on bottom-up sequential wrinkling that will benefit a diverse range of applications and especially those that require large area (>cm2), multiscale, three-dimensional patterns.
Original language | English |
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Pages (from-to) | 5624-5629 |
Number of pages | 6 |
Journal | Nano letters |
Volume | 15 |
Issue number | 8 |
DOIs | |
Publication status | Published - Aug 12 2015 |
Keywords
- Nanowrinkles
- hierarchical texturing
- polymers
- polystyrene
- superhydrophilicity
- superhydrophobicity
ASJC Scopus subject areas
- Bioengineering
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
- Mechanical Engineering