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Jeong, Hoon Eui
Multiscale Biomimetics & Manufacturing Lab
Research Interests
  • Biomimetics
  • Multiscale manufacturing
  • Micro/nanofabrication

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Electrically induced formation of uncapped, hollow polymeric microstructures

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Title
Electrically induced formation of uncapped, hollow polymeric microstructures
Other Titles
Electrically induced formation of uncapped, hollow polymeric microstructures
Author
Lee, Sung HunKim, PilnamJeong, Hoon EuiSuh, Kahp Y.
Keywords
INDUCED SELF-CONSTRUCTION; FILMS; FIELD; FABRICATION; MENISCUS; CELLS
Issue Date
2006-11
Publisher
IOP PUBLISHING LTD
Citation
JOURNAL OF MICROMECHANICS AND MICROENGINEERING, v.16, no.11, pp.2292 - 2297
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
URI
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DOI
10.1088/0960-1317/16/11/007
ISSN
0960-1317
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