Orthogonal Control of Stability and Tunable Dry Adhesion by Tailoring the Shape of Tapered Nanopillar Arrays. (21st October 2015)

• Record Type: Journal Article
• Authors: Cho, Younghyun; Kim, Gyuseok; Cho, Yigil; Lee, Su Yeon; Minsky, Helen; Turner, Kevin T.; Gianola, Daniel S.; Yang, Shu
• Is Part Of: Advanced materials. Volume 27:Number 47(2015)
• Page Start: 7788
• Page End: 7793
• Publication Date: 2015-10-21
• Subjects: anodized aluminum oxide membranes -- dry adhesion -- nanoindentation -- shape effect -- tapered polymer nanopillars; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201503347
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract : Tapered nanopillar structures of different cross‐sectional geometries including cone‐, pencil‐like, and stepwise are prepared from anodized aluminum oxide templates. The shape effect on the adhesion strength is investigated in experiments and simulation. Cone‐shaped nanopillars are highly bendable under load and can recover after unloading, thus, warranting high adhesion strength, 34 N cm −2 . The pencil‐like and stepwise nano­pillars are, however, easily fractured and are not recoverable under the same conditions.