title: Controllable adhesive superhydrophobic surfaces based on PDMS microwell arrays.
abstract: This paper presents a one-step method to fabricate superhydrophobic surfaces with extremely controllable adhesion based on PDMS microwell arrays. The microwell array structures are rapidly produced on PDMS films by a point-by-point femtosecond laser scanning process. The as-prepared superhydrophobic surfaces show water controllable adhesion that ranges from ultrahigh to ultralow by adjusting the extent of overlap of the adjacent microwells, on which the sliding angle can be controlled from 180° (a water droplet can not slide down even when the as-prepared surface is turned upside down) to 3°. A "micro-airbag effect" is introduced to explain the adhesion transition phenomenon of the microwell array structures. This work provides a facile and promising strategy to fabricate superhydrophobic surfaces with controllable adhesion.
authors: State Key Laboratory for Manufacturing System Engineering & Key Laboratory of Photonics Technology for Information of Shaanxi Province, School of Electronics & Information Engineering, Xi'an Jiaotong University , Xi'an, P R China.
authors: Jiale
authors: J
authors: Yong
authors: Feng
authors: F
authors: Chen
authors: Qing
authors: Q
authors: Yang
authors: Dongshi
authors: D
authors: Zhang
authors: Hao
authors: H
authors: Bian
authors: Guangqing
authors: G
authors: Du
authors: Jinhai
authors: J
authors: Si
authors: Xiangwei
authors: X
authors: Meng
authors: Xun
authors: X
authors: Hou
mesh_terms: D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning; D009757:Nylons / Q000737:chemistry*; D013499:Surface Properties; D017155:Wettability
chemical_list: D004129:Dimethylpolysiloxanes; D008567:Membranes, Artificial; D009757:Nylons; C085707:poly(dimethylsiloxane)-polyamide copolymer