Optical Recording of Flow Phenomena in Photoresist based Microfluidic Devices

Subhadeep Mukhopadhyay

doi:10.37591/toeoc.v10i1.3968

Abstract

AbstractIn this experimental work, a set of three individual SU-8 based glass microfluidic devices are fabricated by maskless lithography and indirect bonding technique without having any microfluidic leakage. Dyed ethanol (10% ethanol, 90% red dye) is prepared and used as dyed working liquid. The microfluidic leakage is observed in other set of two leaky microfluidic devices due to improper indirect bonding technique. The effect of surface-to-volume ratio on surface-driven capillary flow of dyed ethanol (10% ethanol, 90% red dye) is experimentally studied. Also, the effect of microfluidic friction on surface-driven capillary flow of dyed ethanol (10% ethanol, 90% red dye) is experimentally studied. Diffusion coefficient as flow parameter is calculated corresponding to each recorded surface-driven capillary flow. This experimental work will be useful to fabricate the microfluidic laboratory-on-a-chip systems related to bioengineering applications.Keywords: SU-8; Ethanol; Microfluidic device; Surface-to-volume ratio; Microfluidic friction; Diffusion coefficientCite this ArticleSubhadeep Mukhopadhyay. Optical Recording of Flow Phenomena in Photoresist based Microfluidic Devices. Trends in Opto-electro & Optical Communication. 2020; 10(1): 36–42p.