Anisotropic dewetting polydimethylsiloxane surface fabricated using ultrashort laser pulses  

作　　者：泮怀海 骆芳芳 林耿 赵全忠 

机构地区：[1]State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences [2]Graduate University of the Chinese Academy of Sciences [3]Department of Electrical and Computer Engineering, National University of Singapore

出　　处：《Chinese Optics Letters》2015年第3期46-50,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61178024 and 11374316);the National Basic Research Program of China(No.2011CB808103);Q.Zhao acknowledges research funding from the Shanghai Pujiang Program(No.10PJ1410600)

摘　　要：Anisotropic dewetting polydimethylsiloxane （PDMS） surfaces, which consist of groove-like micro/ nanostructures （so-called hierarchical structures）, are fabricated using an ultrashort pulsed laser. The contact angles （CAs） are measured parallel to the microgrooves, which are always larger than those measured perpendicular to the microgrooves, exhibiting a superhydrophobic anisotropy of approximately 4°on these fabricated PDMS surfaces at optimized parameters. These pulsed-laser irradiated surfaces exhibit enhanced hydrophobicity with CAs that increase from 116°to 156°while preserving the anisotropic dewetting. Additionally, the wettability of the surfaces with different morphologies is investigated. The temporal evolution of the wettability of the pulsed-laser irradiated PDMS surface is also observed within the first few hours after pulsed laser irradiation.Anisotropic dewetting polydimethylsiloxane （PDMS） surfaces, which consist of groove-like micro/ nanostructures （so-called hierarchical structures）, are fabricated using an ultrashort pulsed laser. The contact angles （CAs） are measured parallel to the microgrooves, which are always larger than those measured perpendicular to the microgrooves, exhibiting a superhydrophobic anisotropy of approximately 4°on these fabricated PDMS surfaces at optimized parameters. These pulsed-laser irradiated surfaces exhibit enhanced hydrophobicity with CAs that increase from 116°to 156°while preserving the anisotropic dewetting. Additionally, the wettability of the surfaces with different morphologies is investigated. The temporal evolution of the wettability of the pulsed-laser irradiated PDMS surface is also observed within the first few hours after pulsed laser irradiation.

关 键 词：PDMS Anisotropic dewetting polydimethylsiloxane surface fabricated using ultrashort laser pulses 

分 类 号：O634.41[理学—高分子化学] TN249[理学—化学]