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Chin. Opt. Lett.
 Home  List of Issues    Issue 03 , Vol. 13 , 2015    10.3788/COL201513.031404


Anisotropic dewetting polydimethylsiloxane surface fabricated using ultrashort laser pulses
Huaihai Pan1;2, Fangfang Luo3, Geng Lin1;2, Quanzhong Zhao1
1 State Key Laboratory of High Field Laser Physics, [Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences], Shanghai 201800, China
2 [Graduate University of the Chinese Academy of Sciences], Beijing 100049, China
3 Department of Electrical and Computer Engineering, [National University of Singapore], Singapore 117576, Singapore

Chin. Opt. Lett., 2015, 13(03): pp.031404

DOI:10.3788/COL201513.031404
Topic:Lasers and laser optics
Keywords(OCIS Code): 140.3390  140.3538  160.1435  160.4236  

Abstract
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 4o on these fabricated PDMS surfaces at optimized parameters. These pulsed-laser irradiated surfaces exhibit enhanced hydrophobicity with CAs that increase from 116o to 156o 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.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Received:2014/10/20
Accepted:2015/1/16
Posted online:2015/3/13

Get Citation: Huaihai Pan, Fangfang Luo, Geng Lin, Quanzhong Zhao, "Anisotropic dewetting polydimethylsiloxane surface fabricated using ultrashort laser pulses," Chin. Opt. Lett. 13(03), 031404(2015)

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



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