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11 articles for “sudden expansion microchannel”
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Effects of Channel Volume and Channel Aspect Ratio on the Surface-Driven Capillary Flow of Dyed Water in Sudden Expansion Microchannels Fabricated by Polymer
Abstract: In this experimental work, total three individual sudden expansion microchannels (microfluidic devices) are fabricated by polymethylmethacrylate (PMMA) using the maskless lithography, hot embossing lithography and direct bonding technique. Dyed water is prepared and used as the selected working liquid. Channel aspect ratio (channel height/channel width) is defined and used as the structural parameter in this work. Diffusion coefficient is used as the flow parameter. Effect of channel volume on the …
Published in Journal of Nanoscience, NanoEngineering & Applications · Vol. 10, Issue 2, 2020 · pp. 18–24 Read article
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Experimental Demonstration on Fabrication Techniques and Recording of Leakage-free Surface-Driven Capillary Flow in the Dual Sudden Expansion Microchannels
Abstract: Dual sudden expansion polymethylmethacrylate (PMMA) microchannels have been fabricated by the maskless lithography, hot embossing lithography, direct bonding technique, and atmospheric pressure air dielectric barrier discharge (DBD) plasma processing. The surface-driven capillary flow of dyed water is faster on the processed PMMA surface than the pristine PMMA surface. The surface-driven capillary flow of dyed water is slower in the wider portion of any dual sudden expansion microchannel. This experimental demonstration …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 8, Issue 2, 2017 · pp. 5–9 Read article
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Passive Capillary Flow of Aqueous Working Liquids in the PMMA Sudden Expansion Microchannels
Abstract: In this report, polymethylmethacrylate (PMMA) as polymer is used to fabricate the sudden expansion microchannels. Maskless lithography and hot embossing lithography are used for pattern transfer resulting into the fabrication of PMMA microchannel structures. Direct bonding is used as the sealing method. Aqueous ethanol and aqueous isopropyl alcohol (IPA) are prepared as aqueous working liquids. The capillary flow characteristics are studied in total 4 individual sudden expansion microchannels, using the …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 9, Issue 1, 2018 · pp. 17–20 Read article
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Recording of Surface-Driven Laminar Flow in Dual Sudden Expansion Microchannel of a Single SU-8 based Glass Microfluidic Device
Abstract: In this work, the SU-8 based glass microfluidic device is fabricated by maskless lithography and indirect bonding technique. A dual sudden expansion microchannel is designed and fabricated inside this fabricated glass microfluidic device. Dyed water is prepared as working liquid by mixing commercially available food dye with distilled water. The surface-driven laminar flow of dyed water inside the fabricated microchannel is recorded by a CMOS camera. This experimental work is …
Published in Recent Trends in Fluid Mechanics · Vol. 7, Issue 1, 2020 · pp. 24–27 Read article
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Surface-Driven Capillary Flow of Dyed Aqueous Ethanol in Sudden Expansion Microchannels
Abstract: AbstractIn this work, total three individual SU-8 based glass microfluidic devices are fabricated by maskless lithography and clamping. Dyed aqueous ethanol is selected as working liquid. Each surface-driven capillary flow is recorded by a CMOS camera. The filling time of surface-driven capillary flow is considered as the flow parameter to determine the flow speed. This work will be useful to fabricate the microfluidic devices for bioengineering applications.Keywords: Sudden expansion, maskless …
Published in Journal of Thermal Engineering and Applications · Vol. 4, Issue 3, 2017 · pp. 22–25 Read article
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Surface-Driven Capillary Flow of AqueousIsopropyl Alcohol in the Sudden Expansion PMMA Microchannels
Abstract: Author has fabricated the PMMA sudden expansion microchannels by the maskless lithography, hot embossing lithography, drilling, direct bonding and chip separation technique. The effect of channel aspect ratio on the surface-driven capillary flow is studied in the sudden expansion microchannels fabricated by PMMA as a polymeric material. Also, the effect of surface wettability on the surface-driven capillary flow is studied in the sudden expansion microchannels fabricated by PMMA. This study …
Published in Emerging Trends in Chemical Engineering · Vol. 4, Issue 2, 2017 · pp. 1–4 Read article
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Passive Capillary Flow of Aqueous Microparticle Suspensions in the Sudden Expansion PMMA Microchannels
Abstract: AbstractAuthor has fabricated a set of sudden expansions micro channels in the polymethylmethacrylate (PMMA) microfluidic devices by the maskless lithography, hot embossing lithography, drilling, air dielectric barrier discharge (DBD) plasma processing, direct bonding technique and chip separation technique. The surface-driven capillary flow of dyed water and three individual aqueous microparticle suspensions are studied with respect to the effects of channel aspect ratio, effective viscosity and surface wettability. The number densities …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 1, 2017 · pp. 13–17 Read article
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Recording on Passive Capillary Flow of Dyed Working Liquids in the Polymer based Microfluidic Devices Fabricated inside the Cleanroom Laboratory
Abstract: In this experimental work, author has fabricated total 13 individual microfluidic devices using the maskless lithography, hot embossing lithography, direct bonding technique, diamond like carbon (DLC) coating, and laboratory-made clamping inside the cleanroom laboratory using author’s own hands-on completely. Polymethylmethacrylate (PMMA) is the chosen polymer to fabricate the 10 individual microfluidic devices due to its plasticity and optical transparency. Dyed water, dyed ethylene glycol and dyed ethanol are the prepared …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 7, Issue 3, 2020 · pp. 35–44 Read article
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Surface-Driven Capillary Flow of Dyed Aqueous Ethanol in the PMMA Microchannel Fabricated by Maskless Lithography, Hot Embossing Lithography and Direct Bonding Technique
Abstract: AbstractPolymethylmethacrylate (PMMA) as polymer is used to fabricate a dual sudden expansion microchannel by the maskless lithography, hot embossing lithography and direct bonding technique inside the cleanroom laboratory. Dyed aqueous ethanol (90% dyed water, 10% ethanol) is used as working liquid to record the surface-driven capillary flow in the fabricated microfluidic device using a CMOS camera catching 25 frames per second with a corresponding time-scale resolution of 0.04 second. This …
Published in Trends in Opto-electro & Optical Communication · Vol. 8, Issue 3, 2018 · pp. 37–40 Read article
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Microfluidic Flow of Dyed Water in the PMMA Microchannels
Abstract: In this work, total three individual polymethylmethacrylate (PMMA) microfluidic devices are fabricated by the maskless lithography, hot embossing lithography, drilling, direct bonding technique and chip separation technique. Dyed water is the working liquid. One sudden expansion microchannel and two microchannel bends are tested by dyed water. The surfacedriven capillary flow is recorded by the CMOS camera. This work will be useful in the fabrication of PMMA lab-on-a-chip systems for microfluidic …
Published in Research & Reviews : Journal of Physics · Vol. 6, Issue 3, 2017 · pp. 10–13 Read article
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Short Review on the Materials for Microfluidics with the Experiments to Record the Surface-Driven Capillary Flow of Dyed Water in Fabricated Microfluidic Device for Bioengineering Applications
Abstract: In this review, dominant features of suitable materials for the fabrication of microfluidic devices are briefly mentioned. Surface modification techniques are useful to vary the flow-speed in microfluidic devices. Surface modification techniques are dependent on the choice of device materials. In this present paper, a single polymeric microfluidic device as sudden expansion microchannel is fabricated by author using maskless lithography, hot embossing lithography and direct bonding technique. Also, the surface-driven …
Published in Recent Trends in Fluid Mechanics · Vol. 7, Issue 3, 2020 · pp. 1–4 Read article