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On the role of oxygen in fabricating microfluidic channels with ultraviolet curable materials

Cited 33 time in Web of Science Cited 34 time in Scopus
Authors
Jeong, Hoon Eui; Suh, Kahp Y.
Issue Date
2008
Publisher
Royal Society of Chemistry
Citation
Lab Chip, 2008, 8, 1787-1792
Keywords
CAPILLARY-ELECTROPHORESISSURFACE MODIFICATIONSOLVENT-RESISTANTFLOW LITHOGRAPHYDEVICESCHIPPOLY(DIMETHYLSILOXANE)MICROCHANNELSSYSTEMSPOLYCARBONATE
Abstract
We present the effects of oxygen on the irreversible bonding of a microchannel using an ultraviolet (UV) curable material of polyurethane acrylate (PUA). Microchannels were fabricated by bonding a top layer with impressions of a microfluidic channel and a bottom layer consisting of a PUA coating on a glass or a polyethylene terephthalate (PET) film substrate. The resulting channel is a homogeneous conduit of the PUA material. To find optimal bonding conditions, the bottom layer was cured under different oxygen concentration and UV exposure time at a constant UV intensity (10 mW cm(-2)). Our experimental and theoretical studies revealed that the channel bonding is severely affected by the concentration of oxygen either in the form of trapped air or permeated air out of the channel. In addition, an optimal UV exposure time is needed to prevent clogging or non-bonding of the channel.
ISSN
1473-0197
Language
English
URI
https://hdl.handle.net/10371/9626
DOI
https://doi.org/10.1039/b810348h
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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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