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86 articles for “Direct bonding”
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Optimisation of the Experimental Methods for the Fabrication of Polymer Microstructures and Polymer Microfluidic Devices for Bioengineering Applications
Abstract: In this research paper, total 2278 individual polymer microstructures have been fabricated, measured and analyzed. Also, in this research paper, total 216 individual polymer microfluidic devices have been fabricated by the maskless lithography, hot embossing lithography, direct bonding technique, and indirect bonding technique, to record and analyze the surface-driven (passive) capillary flow individually in each microfluidic device. Total three individual polymers as SU8, polymethylmethacrylate (PMMA), and polyimide have been used …
Published in Journal of Polymer & Composites · Vol. 4, Issue 3, 2016 · pp. 8–26 Read article
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Experimental Studies on the Passive Capillary Flow of Non-aqueous Working Liquids in PMMA Microfluidic Devices of Rectangular Cross-Sections
Abstract: The polymethylmethacrylate (PMMA) microfluidic devices are fabricated by the maskless lithography, hot embossing lithography and direct bonding technique. The effects of liquid viscosity, surface wettability and channel aspect ratio on the surface-driven capillary flow of non-aqueous working liquids are studied in the fabricated PMMA microfluidic devices. The working liquids are ethylene glycol, isopropyl alcohol (IPA) and ethanol. These experimental studies will be useful to manipulate different non-aqueous working liquids inside …
Published in Journal of Polymer & Composites · Vol. 5, Issue 2, 2017 · pp. 29–33 Read article
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Passive Capillary Flow of Aqueous Working Liquids in the Straight PMMA Microchannels of Rectangular Cross- sections
Abstract: In this report, polymethylmethacrylate (PMMA) is used to fabricate the straight microchannels of uniform channel widths having rectangular cross-sections. Maskless lithography, hot embossing lithography and direct bonding are the chosen techniques to fabrication the straight PMMA microchannels. Aqueous ethanol and aqueous isopropyl alcohol (IPA) are the prepared aqueous working liquids to study the passive capillary flow characteristics. Total 8 individual straight PMMA microchannels are fabricated in this work. This work …
Published in Journal of Petroleum Engineering & Technology · Vol. 8, Issue 2, 2018 · pp. 5–8 Read article
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Short Report on Surface-Driven Capillary Flow of Dyed Water in Straight Microchannel Fabricated by Polymer
Abstract: In this experimental work, a single straight microchannel of rectangular cross-section is fabricated by maskless lithography, hot embossing lithography and direct bonding technique. This microchannel is fabricated using polymethylmethacrylate (PMMA) as optically transparent polymer. Dyed water is selected and prepared as working liquid. CMOS camera is used to record the surface-driven capillary flow of dyed water in the fabricated straight microchannel. This work will be useful in applied chemistry.
Published in Journal of Semiconductor Devices and Circuits · Vol. 7, Issue 3, 2020 · pp. 11–13 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
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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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Surface-Driven Capillary Flow of Aqueous Microparticle Suspensions as Working Liquids in the PMMA Microfluidic Devices
Abstract: AbstractPolymethylmethacrylate (PMMA) microfluidic devices have been fabricated by the maskless lithography, hot embossing lithography, drilling and direct bonding technique. The influence of effective viscosity on the speed of surface-driven capillary flow of aqueous microparticle suspensions has been studied. The surface-driven capillary flow of any particular aqueous microparticle suspension is faster in the microchannel of larger channel aspect ratio. Also, the surface-driven suspension flow is faster on the surface of higher …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 1, 2017 · pp. 18–21 Read article
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Experimental Investigations on the Effects of Channel Aspect Ratio and Surface Wettability to Control the Surface-Driven Capillary Flow of Water in Straight PMMA Microchannels
Abstract: AbstractTotal 214 individual straight 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 experimental investigations on the effects of structural properties (channel aspect ratios) and physical properties (surface wettability, capillary pressure and kinetic energy) on the surface-driven capillary flow of dyed water in straight PMMA microchannels is a novel approach in this …
Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 3, 2016 · pp. 1–12 Read article
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Optical Recording of Surface-Driven Capillary Flow in Straight PMMA Microchannels
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 …
Published in Trends in Opto-electro & Optical Communication · Vol. 10, Issue 1, 2020 · pp. 24–30 Read article
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Short Report on Surface-driven Microfluidic Flow of Dyed Ethanol in Microchannel Bend Fabricated by Optically Transparent Polymer in Cleanroom Environment
Abstract: In this experimental work, a single microchannel bend is fabricated by maskless lithography, hot embossing lithography and direct bonding technique. Polymethylmethacrylate (PMMA) is the chosen optically transparent polymeric material to fabricate the microchannel bend inside the cleanroom laboratory. Dyed ethanol is prepared as working liquid. CMOS camera is used to record the surface-driven capillary flow of dyed ethanol in the fabricated microchannel bend. Effect of centrifugal force on surface-driven capillary …
Published in Trends in Opto-electro & Optical Communication · Vol. 10, Issue 3, 2020 · pp. 1–4 Read article
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Experimental Studies on the Surface-Driven Capillary Flow of Ethanol in the Microfluidic Microchannel Bends
Abstract: Total 36 individual microfluidic devices are fabricated in this work. These microfluidic devices are fabricated by the maskless lithography, hot embossing lithography, direct bonding technique and indirect bonding technique. The surface-driven capillary flow of ethanol is faster in the microchannel of larger channel aspect ratio. The surface-driven capillary flow of ethanol is faster in the microchannel due to the applied centrifugal force. These experimental results are similar in both of …
Published in Recent Trends in Fluid Mechanics · Vol. 3, Issue 3, 2016 · pp. 19–22 Read article
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Experimental Studies on the Effects of Liquid Viscosity and Surface Wettability in PMMA Microfluidic Devices
Abstract: The polymethylmethacrylate (PMMA) microfluidic devices are fabricated by the maskless lithography, hot embossing lithography and direct bonding technique. The effects of liquid viscosity, surface wettability and surface area to volume ratio on the surface-driven capillary flow are studied in the PMMA microfluidic devices using ethylene glycol, isopropyl alcohol (IPA), liquid mixture (aqueous IPA) and ethanol as working liquids. The diffusion coefficient is determined in each surface-driven capillary flow by comparing …
Published in Recent Trends in Fluid Mechanics · Vol. 4, Issue 1, 2017 · pp. 16–21 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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Report on the Separation Efficiency with Separation Time in the Microfluidic Lab-on-a-Chip Systems Fabricated by Polymers in this 21st Century of 3rd Millennium
Abstract: In this report, author has fabricated total 1157 individual microfluidic devices including many microfluidic lab-on-a-chip systems by the maskless lithography, hot embossing lithography, direct bonding technique, clamping, and surface modification techniques, by his own handson completely. Author has used total 30 individual electrical and non-electrical instruments (including the cleanroom equipment) to perform all experiments of this report by his own hands-on completely. Many microfluidic flow phenomena have been experimentally investigated …
Published in Journal of Experimental & Applied Mechanics · Vol. 7, Issue 3, 2016 · pp. 20–37 Read article
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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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Nano-Scale Coating to Demonstrate the Capillary Motion of Dyed Water in a Single PMMA Microfluidic Device towards the Probable Fabrication of nanofluidic Engine-on-a-Chip
Abstract: A single microfluidic device is fabricated by polymethylmethacrylate (PMMA) using the maskless lithography, hot embossing lithography, nano-coating of diamond-like carbon (DLC), and direct bonding technique. A CMOS camera catching 25 frames per second with a corresponding time-scale resolution of 0.04 second is used to record the surface-driven microfluidic flow of dyed water. A comparison is made between the experimental results and analytical solution to determine the diffusion coefficient in this …
Published in Nano Trends – A Journal of Nano Technology & Its Applications · Vol. 22, Issue 3, 2020 · pp. 12–15 Read article
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Short Report on Surface-Driven Water Flow in PMMA Microfluidic Device towards the Principles of Nanofluidics
Abstract: In this experimental work, a single polymethylmethacrylate (PMMA) microfluidic device is fabricated by maskless lithography, hot embossing lithography and direct bonding technique. Dyed water is prepared and used as working liquid. A CMOS camera is used to record the surface-driven microfluidic flow of dyed water in fabricated microfluidic device. The centrifugal effect on capillary flow is prominent in the recorded snap shot images. This work may be useful to generate …
Published in Nano Trends – A Journal of Nano Technology & Its Applications · Vol. 23, Issue 1, 2021 · pp. 1–4 Read article
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Short Review on Fluid Mechanics with the Domain of Nanotechnology for Applications in Nuclear-Reactors
Abstract: In this work, a brief review on microfluidic flow is provided. Also, the brief ideas on very large scale integration (VLSI) circuits are provided. A single polymethylmethacrylate (PMMA) based gradual expansion microchannel is fabricated by the maskless lithography, hot embossing lithography and direct bonding technique. Surface-driven microfluidic flow of dyed water is recorded in the fabricated device using a CMOS camera catching 25 frames per second with a corresponding time-scale …
Published in Nano Trends – A Journal of Nano Technology & Its Applications · Vol. 23, Issue 2, 2021 · pp. 45–50 Read article
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Short Review on Anti-adhesion Coating in Microfluidics for Applications in Biotechnology
Abstract: In this short review, the use of diamond-like carbon (DLC) as anti-adhesion coating in microfluidics is described. The anti-adhesion coating is required on SU-8 based silicon stamp surface to fabricate the polymethylmethacrylate (PMMA) based microfluidic devices using maskless lithography, hot embossing lithography and direct bonding technique. Also, the DLC coating is required on PMMA microchannel surface to change the surface-driven capillary flow of water in PMMA microfluidic devices. The static …
Published in Research and Reviews : A Journal of Biotechnology · Vol. 11, Issue 1, 2021 · pp. 1–3 Read article
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Short Experimental Report with Brief Review on Biomicrofluidics in Biotechnology
Abstract: In this experimental work, a single prototype microchannel bend is fabricated by maskless lithography, hot embossing lithography and direct bonding technique. The surface-driven microfluidic flow of dyed water is recorded in the fabricated prototype bend. A brief review on bio-microfluidics is provided in this short experimental report towards the applications in biotechnology. Polymethylmethacrylate (PMMA) is an efficient polymer to fabricate the microfluidic lab-on-a-chip systems. This short experimental report may be …
Published in Research and Reviews : A Journal of Biotechnology · Vol. 10, Issue 3, 2020 · pp. 1–4 Read article