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Experiments on the Passive Capillary Flow of Aqueous Ethanol in Sudden Expansion Microchannels towards the Applications in Nanofluidics and Nanoelectromechanical Systems

Subhadeep Mukhopadhyay

Abstract


In this work, total three individual sudden expansion microchannels are designed and fabricated by maskless lithography, hot embossing lithography and direct bonding technique inside the cleanroom laboratory. Polymethylmethacrylate (PMMA) is used as the selected polymer to fabricate these microchannels. Aqueous ethanol (15% ethanol, 85% dyed water) is prepared and used as dyed working liquid. Surface-driven (passive) capillary flow of prepared working liquid is recorded by a CMOS camera corresponding to each fabricated microchannel to study the recorded flow feature. This experimental work may be useful for applications in nanofluidics and Nanoelectromechanical systems.

Keywords


Hot embossing; PMMA; Sudden expansion; Capillary flow; Nanofluidics

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References


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