STM Journals Peer-reviewed research from Consortium e-Learning Network

Journal of Thin Films, Coating Science Technology & Application

Surface-Driven Capillary Flow on Microchannel Surface Coated with Diamond like Carbon of Nano-scale Thickness towards the Applications in Statistical Features of Fluid Mechanics

  1. Subhadeep Mukhopadhyay

Abstract

In this experimental work, polymethylmethacrylate (PMMA) is the chosen polymer as device material to fabricate the microfluidic devices. PMMA is optically transparent polymer which is a facility to record the microfluidic flow of any dyed working liquid inside the fabricated microchannels. Two individual microfluidic devices are fabricated by lithographic techniques. Dyed water is selected and prepared as working liquid. Leakage-free surface-driven capillary flow of dyed water is recorded corresponding to each fabricated device using a CMOS camera catching 25 frames per second with a time-scale resolution of 0.04 second. The diamond like carbon (DLC) coating is used as a thin solid film on microchannel surface to vary the surface wettability. Effect of surface wettability on the surface-driven capillary flow of dyed water is studied. In this work, the probable statistical features of fluid mechanics are mentioned. Fluid mechanics follows the principles of classical statistical mechanics, for example, the situation of microfluidic flow of any gaseous material at room temperature. Hence, the future work on fluid mechanics includes the investigations on the statistical features of gaseous microfluidic flow. This present experimental work will be useful in microfluidic bioengineering applications at commercial standard.

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