title: Harnessing localized ridges for high-aspect-ratio hierarchical patterns with dynamic tunability and multifunctionality.
abstract: A simple method for fabricating high-aspect-ratio, hierarchical, and dynamically tunable surface patterns is invented by harnessing localized-ridge instabilities in gold nanofilms coated on elastomer substrates (a); a theoretical model to calculate the critical parameters (e.g., wavelength and amplitude) for designing the new patterns is developed (b); and novel applications of the patterns as super-hydrophobic coatings (c) and biomimetic cell-culture substrates (d) capable of on-demand tunability are demonstrated.
authors: Soft Active Materials Laboratory, Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA; Research School of Engineering, Australian National University, Canberra, ACT, 0200, Australia.
authors: Changyong
authors: C
authors: Cao
authors: Hon Fai
authors: HF
authors: Chan
authors: Jianfeng
authors: J
authors: Zang
authors: Kam W
authors: KW
authors: Leong
authors: Xuanhe
authors: X
authors: Zhao
mesh_terms: D040761:Biomimetic Materials / Q000737:chemistry; D002478:Cells, Cultured; D020724:Elastomers / Q000737:chemistry*; D020342:Finite Element Analysis; D017612:Gold Compounds / Q000737:chemistry*; D006801:Humans; D057927:Hydrophobic and Hydrophilic Interactions; D008422:Materials Testing; D059630:Mesenchymal Stem Cells / Q000166:cytology / Q000502:physiology; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods; D013499:Surface Properties; D054457:Tissue Scaffolds / Q000737:chemistry; D017155:Wettability
chemical_list: D020724:Elastomers; D017612:Gold Compounds
keywords: cell alignment; hierarchical patterns; instability; localized ridge; superhydrophobicity