title: Highly durable and unidirectionally stooped polymeric nanohairs for gecko-like dry adhesive.
abstract: Gecko-like dry adhesive using high aspect ratio polymeric nanohairs has insuperable limitations, although it has huge potential in many applications. Repeated harsh contacts on a target substrate lead to physical collapse of nanohairs and significant degradation of the adhesion property, because the polymeric nanohairs are quite fragile due to poor mechanical robustness. Herein, we demonstrate a highly robust gecko-like dry adhesive with unidirectionally stooped polymeric nanohairs (diameter 100 nm) with a high aspect ratio (∼9) using an ultrathin metal coating. 100 cycles of repeated adhesion tests with 1 N preloading force did not significantly degrade adhesion or cause collapse of nanohairs. We believe that this approach allows gecko-like dry adhesive to be utilized in many related applications and diverse industry interests.
authors.affiliation: Center for Neuroscience Imaging Research, Institute of Basic Science (IBS), Suwon 440-746, Korea. School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 440-746, Korea.
authors.forename: Hyeon Seong
authors.initials: HS
authors.lastname: Im
authors.forename: Ki Yoon
authors.initials: KY
authors.lastname: Kwon
authors.forename: Jong Uk
authors.initials: JU
authors.lastname: Kim
authors.forename: Kwang Su
authors.initials: KS
authors.lastname: Kim
authors.forename: Hoon
authors.initials: H
authors.lastname: Yi
authors.forename: Pil J
authors.initials: PJ
authors.lastname: Yoo
authors.forename: Changhyun
authors.initials: C
authors.lastname: Pang
authors.forename: Hoon Eui
authors.initials: HE
authors.lastname: Jeong
authors.forename: Tae-il
authors.initials: TI
authors.lastname: Kim