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International Journal of Composite and Constituent Materials

Dielectric Barrier Discharge Plasma Processing on Pristine PMMA Surfaces for Microfluidic Applications towards Applied Nanotechnology

  1. Subhadeep Mukhopadhyay

Abstract

In this experimental work, a total of six individual microchannel bends as microfluidic devices are fabricated by maskless lithography, hot embossing lithography and direct bonding technique using polymethylmethacrylate (PMMA). Air dielectric barrier discharge (DBD) plasma processing is the selected surface modification technique in this particular experimental work. Dyed aqueous ethanol (10% ethanol, 90% dyed water) is the prepared working liquid to study the microfluidic flow characteristics. Effect of channel aspect ratio on surface-driven capillary flow of working liquid is studied. Also, the effect of centrifugal force on surface-driven capillary flow of working liquid is studied. Further, the effect of surface wettability on surface-driven capillary flow of working liquid is studied. Each surface-driven capillary flow is recorded by a CMOS camera catching 25 frames per second with a corresponding time-scale resolution of 0.04 second. This experimental work may be useful in commercial bioengineering applications towards applied nanotechnology.

Keywords

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