A super-lyophobic PDMS micro-tunnel as a novel microfluidic platform for oxidized Galinstan

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...

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Bibliographic Details
Main Authors: Kim, Daeyoung, Lee, Dong-Weon, Choi, Wonjae, Lee, Jeong-Bong
Format: Conference Proceeding
Language:English
Subjects:
Mathematical model
Metals
Microfluidics
Micromechanical devices
Rough surfaces
Surface roughness
Surface texture
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Summary: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.
ISSN:1084-6999
DOI:10.1109/MEMSYS.2012.6170184