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46 articles for “microfluidics”
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Surface-Driven Capillary Flow of Dyed Working Liquid in the SU-8 based Glass Microfluidic Device Fabricated by Maskless Lithography and Indirect Bonding Technique
Abstract: A single SU-8 based glass microfluidic device is fabricated by the maskless lithography and indirect bonding technique, using the negative photoresist SU-8. Polymethylmethacrylate (PMMA) dissolved in EC solvent (SU-8 developer) is used as the prepared adhesive material in the indirect bonding technique. Dyed water (90% red coloured food dye, 10% distilled water) is prepared as the working liquid. A CMOS camera catching 25 frames per second with a corresponding time-scale …
Published in International Journal of Microelectronics and Digital integrated circuits · Vol. 4, Issue 2, 2018 · pp. 26–31 Read article
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Experimental Background, Designs and Bioengineering Applications of Microfluidic Immunosensor Devices
Abstract: In this short review, the microfluidic Immunosensor devices are briefly reviewed. In the last few years, the experimental techniques have been developed to immobilize the antibodies and other relevant molecules. Also, surface modification techniques have been developed to resist the non-specific adsorption. Fluorescence and electrochemistry are used as detection methods. In future, the microfluidic Immunosensor devices will be used for better sensitive detection, miniaturization, increased integration, multianalyte analysis and many …
Published in International Journal of Telecommunications & Emerging Technologies · Vol. 4, Issue 1, 2018 · pp. 6–9 Read article
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Review on the Polymer based Microfluidic Devices for Bioengineering Applications
Abstract: In this review, few recently published research papers related to the experimental investigations are briefly summarized. The experimental observations on different effects to control the surface-driven capillary flow are mentioned related to the polymer microfluidic devices. According to the literature survey in this article, the negative photoresist SU-8 and polymethylmethacrylate (PMMA) are the two major polymers to fabricate the microfluidic devices using different conventional techniques. This review will be useful …
Published in International Journal of Polymer Science and Engineering · Vol. 4, Issue 2, 2018 · pp. 44–48 Read article
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Passive Capillary Flow of Dyed Aqueous Isopropyl Alcohol in the Leakage-Free SU-8 based Glass Microfluidic Devices
Abstract: In this work, total 2 individual SU-8 based glass microfluidic devices are fabricated by the maskless lithography and indirect bonding technique. The aqueous isopropyl alcohol (10% IPA, 90% dyed water) is prepared to test these fabricated devices. Each passive capillary flow is recorded by the CMOS camera catching 25 frames per second. This work will be useful in bioengineering applications. Keywords: Passive capillary flow, SU-8, Aqueous IPA, Microfluidic device
Published in International Journal of Chemical Engineering and Processing · Vol. 4, Issue 1, 2018 · pp. 30–32 Read article
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Review on the Separation Mechanisms in Microfluidics for Bioengineering Applications
Abstract: In this review, author has mentioned different techniques of separation mechanisms in bioengineering, like passive separation, magnetic separation, electrical separation, optical separation and acoustic separation. The extraction of blood plasma from human whole blood by separating blood cells is a need in biomedical industry. In the recent past, Mukhopadhyay as author has demonstrated different passive techniques to separate the polystyrene microparticles of different sizes in the designed microfluidic laboratory-on-a-chip systems …
Published in International Journal of Renewable Energy and its Commercialization · Vol. 4, Issue 1, 2018 · pp. 22–27 Read article
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Effect of Circular Polyimide Micropillars on Surface-Driven Capillary Flow of Dyed Working Liquids inside the SU-8 based Glass Microfluidic Devices
Abstract: In this experimental work, total 8 individual SU-8 based glass microfluidic devices are fabricated using Mukhopadhyay’s own hands-on completely. Maskless lithography and indirect bonding technique are the methods to fabricate these devices. 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 capillary flow in each device. Dyed water and dyed ethylene glycol are the selected and prepared …
Published in International Journal of Water Resources Engineering · Vol. 6, Issue 1, 2020 · pp. 1–9 Read article
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Dielectric Barrier Discharge Plasma Processing on Pristine PMMA Surfaces for Microfluidic Applications towards Applied Nanotechnology
Abstract: In this experimental work, a total of six individual microchannel bends as microfluidic devices are fabricated by maskless lithography, hot embossing lithography and direct bonding technique using polymethylmethacrylate (PMMA). Air dielectric barrier discharge (DBD) plasma processing is the selected surface modification technique in this particular experimental work. Dyed aqueous ethanol (10% ethanol, 90% dyed water) is the prepared working liquid to study the microfluidic flow characteristics. Effect of channel aspect …
Published in International Journal of Composite and Constituent Materials · Vol. 6, Issue 1, 2020 · pp. 1–7 Read article
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Short Report on the Effect of Atmospheric Dielectric Barrier Discharge Plasma Processing to Control the Capillary Flow in Polymer based Microfluidic Devices
Abstract: In this experimental work, a couple of microfluidic devices are fabricated by polymethylmethacrylate (PMMA) using the maskless lithography, hot embossing lithography and direct bonding technique. One device is fabricated by pristine PMMA, and the other device is fabricated by dielectric barrier discharge (DBD) plasma processed PMMA. Dyed water is selected and prepared as working liquid. Each surface-driven capillary flow of dyed water is recorded by a CMOS camera. This work …
Published in International Journal of Polymer Science and Engineering · Vol. 6, Issue 2, 2020 · pp. 1–4 Read article
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Short Report on the Polymer based Microfluidic Device Fabricated by Lithographic Techniques
Abstract: In this experimental work, a single microfluidic device is fabricated by maskless lithography, hot embossing lithography and direct bonding technique inside the cleanroom laboratory. Microchannel bend is the selected design to fabricate the microfluidic device. Dyed ethanol is selected and prepared as working liquid. The surface-driven capillary flow of dyed ethanol is recorded in the fabricated microchannel bend using a CMOS camera inside the materials-science laboratory. Effect of centrifugal force …
Published in International Journal of Polymer Science and Engineering · Vol. 6, Issue 2, 2020 · pp. 17–20 Read article
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Experimental Demonstration on Polymer based Microfluidics
Abstract: In this experimental work, a single polymer based gradual expansion microchannel is designed. This microchannel is fabricated by the maskless lithography, hot embossing lithography and direct bonding technique inside the cleanroom laboratory. Dyed water is the prepared working liquid in this work. The surface-driven (passive) 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 resolution …
Published in International Journal of Polymer Science and Engineering · Vol. 7, Issue 1, 2021 · pp. 23–26 Read article
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Thermodynamic Explanation on Surface-Driven Capillary Flow of Working Liquids in the Microfluidic Devices Fabricated by Polymers
Abstract: In this experimental work, total 100 individual microfluidic devices are fabricated by polymers using author’s own hands-on completely. A set of straight microchannels, gradual expansion microchannels, sudden expansion microchannels and sudden contraction microchannels are fabricated by SU-8 using the maskless lithography and indirect bonding technique. Another set of straight microchannels, gradual expansion microchannels, sudden expansion microchannels and sudden contraction microchannels are fabricated by PMMA using the maskless lithography, hot embossing …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 6, Issue 1, 2020 · pp. 45–70 Read article
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Laser-induced Phosphorescence Photobleaching Anemometer for Microfluidic Technology Instruments
Abstract: In this article, we have established a new, non-intrusive flow velocity calculation approach focused on photobleaching of a fluorescent dye for micro-fluidic systems. The time of existence of the fluorescent dye in the laser beam depends on the flow rate which roughly relates to the time of decay of the photobleaching of the dye in the laser beam. The time of residency is inversely proportional to the speed of flow. …
Published in International Journal of Analog Integrated Circuits · Vol. 6, Issue 2, 2020 · pp. 11–20 Read article
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Experimental Studies on the Surface-Driven Microfluidic Flow of Dyed Working Liquids in Sudden Expansion Microchannels Fabricated by Polymer
Abstract: In this experimental work, the sudden expansion microchannels are fabricated by maskless lithography, hot embossing lithography, drilling, direct bonding technique and chip separation technique using own hands-on of author completely. Total 15 individual sudden expansion microchannels are fabricated in this work using polymethylmethacrylate (PMMA) as optically transparent polymer. Effects of channel aspect ratio, surface wettability and liquid viscosity on surface-driven microfluidic flow are experimentally studied in the fabricated sudden expansion …
Published in International Journal of Polymer Science and Engineering · Vol. 6, Issue 1, 2020 · pp. 44–59 Read article
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Nano-Scale Fluid Mechanics: A Review
Abstract: This review article is mainly focused on microfluidics and nanofluidics. Nanofluidics is the subject to realise any nano-scale fluid mechanics governed inside the selected nanochannel. The surface-driven microfluidic flow of dyed water is experimentally demonstrated corresponding to one SU-8 based glass microfluidic device fabricated by maskless lithography and indirect bonding technique. This brief review may be helpful to establish the nanofluidic flow phenomena in future.
Published in International Journal of Composite and Constituent Materials · Vol. 7, Issue 1, 2021 · pp. 12–17 Read article
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Revolutionizing Healthcare: Cutting-Edge Biosensors Paving the Way for 21st Century Point-of-Care Diagnostics
Abstract: Point-of-care (POC) diagnostics stand as a transformative paradigm in healthcare, promising rapid testing directly at patient care sites. Biosensors, amalgamating biological recognition elements with physico-chemical transducers, emerge as pivotal tools in crafting rapid and sensitive POC diagnostic devices. Recent strides in nanotechnology, microfluidics, and flexible electronics have engendered a wave of innovative biosensor designs and detection methodologies. This paper provides an extensive review of the latest advancements in biosensors tailored …
Published in International Journal of Industrial Biotechnology and Biomaterials · Vol. 9, Issue 2, 2023 · pp. 12–19 Read article
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Passive Capillary Flow of Dyed Ethanol for Nanofluidics
Abstract: In this experimental work, a single polymethylmethacrylate (PMMA) microchannel bend as microfluidic device is fabricated by maskless lithography, hot embossing lithography and direct bonding technique. Dyed ethanol is prepared and used as working liquid in this work. A CMOS camera is used to capture the surface-driven capillary flow of dyed ethanol in the fabricated PMMA microchannel bend. In future, this experimental work may be useful to establish the nanofluidic flow …
Published in International Journal of Applied Nanotechnology · Vol. 7, Issue 1, 2021 · pp. 18–23 Read article
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Development of Nano-enabled Biosensors for Early Detection of Cardiovascular Diseases
Abstract: Cardiovascular diseases (CVDs) represent a significant global health burden, necessitating early and accurate detection for timely intervention and improved patient outcomes. This article explores the development of nano-enabled biosensors as a promising approach for the early detection of CVDs. It provides a comprehensive overview of the field, including a literature review, fundamental principles, design considerations, and recent advancements.The article delves into the roles and clinical applications of various cardiovascular disease …
Published in International journal of Nanobiotechnology · Vol. 10, Issue 1, 2024 Read article
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Classification of Microvalves ---- A Review
Abstract: Miniaturization of microvalves is required in many microfluidic applications towards the commercial standards. As examples, the applications of microvalves are flow regulation and on/off switching. Microvalves are primarily divided into active microvalves and passive microvalves according to their working principles. These microvalves may be involved with mechanical systems, non-mechanical systems and external systems. This educational short review is authored as the study material for proposed elective-course on Microfluidics (M.Tech, Theory) …
Published in International Journal of Chemical Separation Technology · Vol. 4, Issue 1, 2018 · pp. 16–18 Read article
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Passive Capillary Flow of Dyed Aqueous Ethanol in the Leakage-Free PMMA Microchannel
Abstract: A single polymethylmethacrylate (PMMA) microfluidic device is fabricated by the maskless lithography, hot embossing lithography and direct bonding technique. This device is tested by dyed aqueous ethanol (10% ethanol, 90% dyed water) in leakage-free condition. The passive capillary flow of dyed aqueous ethanol is recorded by a CMOS camera catching 25 frames per second. This work will be useful in commercial bioengineering applications. Keywords: Passive capillary flow, PMMA, Aqueous ethanol, …
Published in International Journal of Renewable Energy and its Commercialization · Vol. 4, Issue 1, 2018 · pp. 12–14 Read article
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Short Review on the Features of Nanofluidics as the Nanoscale Fluid Mechanics in Nanotechnology
Abstract: In this short review, author has reviewed on the features of nanofluidics based on the published literatures. Both of theory and experiment are needed to be developed related to Nanofluidics. Author has made a brief comparison between microfluidics and nanofluidics. Entire fluid mechanics is a branch of classical mechanics having the levels of bulk-fluidics, microfluidics and nanofluidics. Carbon nanotube (CNT) based nanofluidic flow phenomena are an interesting topic towards proper …
Published in International Journal of Applied Nanotechnology · Vol. 6, Issue 2, 2020 · pp. 5–9 Read article