Optical Recording of Surface-Driven Capillary Flow in Straight PMMA Microchannels

Subhadeep Mukhopadhyay

doi:10.37591/toeoc.v10i1.3969

Abstract

AbstractIn this experimental work, a total of six individual straight microchannels are fabricated using maskless lithography, hot embossing lithography and direct bonding technique. Polymethylmethacrylate (PMMA) is the selected transparent polymer to fabricate these microchannels facilitating the optical recording of the surface-driven capillary flow of dyed water (working liquid) using a CMOS camera catching 25 frames per second with a corresponding time-scale resolution of 0.04 second. Dyed water as dyed working liquid is prepared to test the fabricated straight microchannels facilitating the optical recording of surface-driven capillary flow. Analysis is performed on each surface-driven capillary flow with respect to the effects of channel aspect ratio and surface wettability. Diffusion coefficient is determined as flow parameter corresponding to each surface-driven capillary flow of dyed water. This experimental work will be useful in commercial bioengineering applications to fabricate the microfluidic lab-on-a-chip systems.Keywords: PMMA; Dyed water; Optical recording; CMOS camera Cite this ArticleSubhadeep Mukhopadhyay. Optical Recording of Surface-Driven Capillary Flow in Straight PMMA Microchannels. Trends in Opto-electro & Optical Communication. 2020; 10(1): 24–30p.