DocumentCode :
3546639
Title :
A super-lyophobic PDMS micro-tunnel as a novel microfluidic platform for oxidized Galinstan®
Author :
Daeyoung Kim ; Dong-weon Lee ; Wonjae Choi ; Jeong-Bong Lee
Author_Institution :
Dept. of Electr. Eng., Univ. of Texas at Dallas, Dallas, TX, USA
fYear :
2012
fDate :
Jan. 29 2012-Feb. 2 2012
Firstpage :
1005
Lastpage :
1008
Abstract :
We report a micro pillar array-based super-lyophobic poly(dimethyl siloxane) (PDMS) micro-tunnel as a novel microfluidic platform for oxidized Galinstan®. Liquid-metal alloy, Galinstan® was expected to be widely utilized in many MEMS applications due to its favorable properties. However, the fact that Galinstan® gets easily oxidized and wets on almost nearly any surface is the difficult challenge for utilization of Galinstan®. We studied various pitch distance micro pillar arrays and evaluated lyophobicity of Galinstan® using static contact angle and sliding angle. A unique approach to fabricate 3-dimensional (3-D) lyophobic micro-tunnel structure was designed using flexible PDMS, which can overcome the limitation of current lithography techniques. It was demonstrated the movement of oxidized Galinstan® without wetting.
Keywords :
microfabrication; microfluidics; liquid metal alloy; microfluidic platform; micropillar array; microtunnel; oxidized Galinstan®; super lyophobic poly(dimethyl siloxane); superlyophobic PDMS; Mathematical model; Metals; Microfluidics; Micromechanical devices; Rough surfaces; Surface roughness; Surface texture;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Micro Electro Mechanical Systems (MEMS), 2012 IEEE 25th International Conference on
Conference_Location :
Paris
ISSN :
1084-6999
Print_ISBN :
978-1-4673-0324-8
Type :
conf
DOI :
10.1109/MEMSYS.2012.6170184
Filename :
6170184
Link To Document :
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