SHERP

Electrically induced formation of uncapped, hollow polymeric microstructures

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Authors
Lee, Sung Hun; Kim, Pilnam; Jeong, Hoon Eui; Suh, Kahp Y.
Issue Date
2006-11
Publisher
Institute of Physics
Citation
J. Mocromech. Microeng. 16 2292-7
Keywords
INDUCED SELF-CONSTRUCTIONFILMSFIELDFABRICATIONMENISCUSCELLS
Abstract
Uncapped, hollow polymeric microstructures were fabricated on a silicon substrate using electric field induced stretching and detachment. Initially, square or cylinder microposts were generated using a solvent-assisted capillary molding technique, and a featureless electrode mask was positioned on the top of the microstructure with spacers maintaining an air gap (similar to 20 mu m). Upon exposure to an external electric field (1.0-3.0 V mu m(-1)), the hollow microstructures were destabilized and stretched by the well-known electrohydrodynamic instability, resulting in contact of the top polymer surface with the mask. Subsequently, detachment of the capping layer occurred upon removal of the mask due to larger adhesion forces at the polymer/mask interface than cohesion forces of the polymer. These hollow microstructures were tested to capture the budding yeast, Saccharomyces cerevisiae, for shear protection.
ISSN
0960-1317
Language
English
URI
http://hdl.handle.net/10371/8371
DOI
https://doi.org/10.1088/0960-1317/16/11/007
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Mechanical Aerospace Engineering (기계항공공학부)Journal Papers (저널논문_기계항공공학부)
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