37 publications
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Passive Capillary Flow of Dyed Aqueous Ethanol in the Leakage-Free PMMA MicrochannelBy Subhadeep Mukhopadhyay
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 Classification of MicromixersBy Subhadeep Mukhopadhyay
Abstract: Miniaturisation of micron-scale devices produces advantages in analytical chemistry and life science. Micromixers are being used in modern microfluidic systems to facilitate the laboratory-scale operation in small microchips towards the production of microfluidic laboratory-on-a-chip systems for global-market. Polymers are proved to be suitable materials for the fabrication of micromixers. Passive micromixers have the advantage of simple designs and low cost of fabrication. Micromixers have the applications in analytical chemistry and …
Published in International Journal of Composite Materials and Matrices · Vol. 4, Issue 1, 2018 · pp. 1–3 Read article →
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Experimental Demonstration on the Recording of Capillary-Filled Microfluidic Devices Fabricated by Polymeric MaterialBy Subhadeep Mukhopadhyay
Abstract: In this present experimental work, total 52 individual PMMA microfluidic devices are fabricated by maskless lithography, hot embossing lithography and direct bonding technique in a cleanroom laboratory. The selected working liquids are dyed water, dyed aqueous ethanol and dyed aqueous isopropyl alcohol and are prepared in a materials-science laboratory. Fabricated microfluidic devices are tested by the prepared aqueous working liquids, and each capillary-filled device after the surface-driven microfluidic flow is …
Published in International Journal of Polymer Science and Engineering · Vol. 5, Issue 2, 2019 · pp. 31–41 Read article →
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Passive Capillary Flow of Dyed Ethylene Glycol in the SU-8 based Glass Microfluidic Devices Fabricated by Microfabrication TechnologiesBy Subhadeep Mukhopadhyay
Abstract: In this work, total 4 individual SU-8 based glass microfluidic devices are fabricated by the steps of maskless lithography and indirect bonding technique using author’s own hands-on completely. Dyed ethylene glycol (80% red dye, 20% ethylene glycol) is prepared as working liquid. The 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 of dyed ethylene glycol …
Published in International Journal of Chemical Engineering and Processing · Vol. 5, Issue 1, 2019 · pp. 37–42 Read article →
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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 TechniqueBy Subhadeep Mukhopadhyay
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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Leakage-Free Microfluidic Flow of the Dyed Aqueous Ethanol in a single SU-8 based Glass Microfluidic Device Fabricated by the Selected Microfabrication TechnologiesBy Subhadeep Mukhopadhyay
Abstract: In this work, a single SU-8 based glass microfluidic device is fabricated by the maskless lithography and indirect 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. Dyed aqueous ethanol (80% dyed water, 20% ethanol) is prepared to be used as working liquid. A surface-driven microfluidic flow of the prepared working liquid is …
Published in International Journal of Microelectronics and Digital integrated circuits · Vol. 4, Issue 2, 2018 · pp. 13–17 Read article →
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Short Review on the Electronic Properties of High Electron Mobility Transistors for the Applications in Digital CommunicationBy Subhadeep Mukhopadhyay
Abstract: In this review work, author has briefly reviewed on the relevant electronic properties to control the electrical properties of high electron mobility transistors (HEMTs). The electrical characteristics are reviewed corresponding to the microelectronic and Nanoelectronic HEMTs from the miniaturization point of view. Also, the effects of aluminium mole fraction, doping concentration and nano-layer thickness to control the drain current are reviewed. This work may be helpful to fabricate the electronic …
Published in International Journal of Digital Communication and Analog Signals · Vol. 4, Issue 2, 2018 · pp. 24–28 Read article →
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Review on the Polymer based Microfluidic Devices for Bioengineering ApplicationsBy Subhadeep Mukhopadhyay
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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Review on the Hot Embossing Technology to Fabricate the Polymer based Microfluidic Devices in Mechanical EngineeringBy Subhadeep Mukhopadhyay
Abstract: Polymers are suitable materials to fabricate the microfluidic devices in mechanical engineering. Hot embossing technology is useful to fabricate these polymer based microfluidic devices. Both of the lithography and direct bonding can be performed by hot embossing technology to fabricate these polymer based microfluidic devices. Polymer microfluidic devices fabricated by the hot embossing technology are useful in multifarious bioengineering applications according to the available literatures. Keywords: Hot embossing, Polymer, Microfluidics, …
Published in International Journal of Polymer Science and Engineering · Vol. 4, Issue 1, 2018 · pp. 34–37 Read article →
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Review on the Capillary Flow Characteristics in Polymer based Microfluidic SystemsBy Subhadeep Mukhopadhyay
Abstract: In this review different effects to control the surface-driven capillary flow in polymer based microfluidic systems. Author has used the polymers like polyimide, SU-8 and polymethylmethacrylate (PMMA) to fabricate the polymer based microfluidic systems. Author has studied the individual effects of surface wettability, surface free energy, surface chemistry, surface topography, channel aspect ratio, capillary pressure, kinetic energy, centrifugal force, surface area to volume ratio, microfluidic friction, liquid viscosity and effective …
Published in International Journal of Polymer Science and Engineering · Vol. 4, Issue 1, 2018 · pp. 28–33 Read article →
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Classification of Microvalves ---- A ReviewBy Subhadeep Mukhopadhyay
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 Water in SU-8 based Glass Microfluidic Devices integrated with Polyimide Layer on the Bottom WallBy Subhadeep Mukhopadhyay
Abstract: In this work, total 4 individual SU-8 based glass microfluidic devices are fabricated by the maskless lithography and indirect bonding technique. The polyimide layer is integrated on the selected portion of glass bottom wall of each device. Each passive capillary flow of dyed water is recorded by a CMOS camera catching 25 frames per second. This work will be useful to fabricate the SU-8 based laboratory-on-a-chip systems for microfluidic applications. …
Published in International Journal of Chemical Separation Technology · Vol. 4, Issue 1, 2018 · pp. 13–15 Read article →
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Experimental Studies on the Surface-Driven Capillary Flow of Water in Pristine and Processed Microfluidic Devices Fabricated by PMMABy Subhadeep Mukhopadhyay
Abstract: In this work, air dielectric barrier discharge (DBD) plasma processing on pristine polymethylmethacrylate (PMMA) flat surface is the chosen surface modification technique to vary the surface wettability creating a difference in microfluidic speed of dyed water. Straight microchannel of uniform width, microchannel with integrated micropillars on bottom wall, and microchannel bend are the proposed designs of PMMA microfluidic devices in this work. Each microfluidic flow of dyed water is recorded …
Published in International Journal of Chemical Engineering and Processing · Vol. 4, Issue 1, 2018 · pp. 33–38 Read article →
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Passive Capillary Flow of Dyed Aqueous Isopropyl Alcohol in the Leakage-Free SU-8 based Glass Microfluidic DevicesBy Subhadeep Mukhopadhyay
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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Experimental Background, Designs and Bioengineering Applications of Microfluidic Immunosensor DevicesBy Subhadeep Mukhopadhyay
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 Designs and Characteristics of High-Electron Mobility TransistorsBy Subhadeep Mukhopadhyay, Sanjib Kalita
Abstract: Many authors have presented different physics based analytical models to manifest the characteristics of high electron mobility transistors (HEMTs). The designs of HEMTs are highly important to achieve sufficient efficiency. Conduction band engineering in HEMTs is the reason to generate a two-dimensional electron gas (2DEG) at the heterointerface. Microelectromechanical systems (MEMS) and microwave engineering are the relevant areas for the applications of HEMTs.
Published in International Journal of Microwave Engineering and Technology · Vol. 4, Issue 1, 2018 · pp. 20–41 Read article →
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Methodologies and Bioengineering Applications of Microfluidic Laboratory-on-a-Chip SystemsBy Subhadeep Mukhopadhyay
Abstract: Any microchannel has at least one of the height, width, diameter or length having the dimension of less than one millimeter. Microfluidics is the subject dealing with the movements of liquid or gas inside the microchannels. The principles of microfluidics are highly used in the microfluidic lab-on-a-chip systems to achieve the desired operation. In the last few years, the microfabrication methodologies are highly improved to fabricate the microfluidic lab-on-a-chip systems …
Published in International Journal of Embedded Systems and Emerging Technologies · Vol. 4, Issue 1, 2018 · pp. 1–3 Read article →