30 publications
-
Published Subscription
Short Review on the Particle Image Velocimetry in Fluid MechanicsBy Subhadeep Mukhopadhyay
Abstract: In this short review, the reports by few authors on particle image velocimetry are briefly described. The features of particle image velocimetry are briefly mentioned. Also, in this short review, an experimental demonstration on microfluidic flow is presented by Mukhopadhyay as author. A single microchannel bend is fabricated by microfabrication techniques. Dyed water is prepared as working liquid. The surface-driven capillary flow of dyed water is recorded and shown corresponding …
Published in Recent Trends in Fluid Mechanics · Vol. 7, Issue 3, 2020 · pp. 10–14 Read article →
-
Published Subscription
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 ApplicationsBy Subhadeep Mukhopadhyay
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 →
-
Published Subscription
Short Report on Surface-Driven Capillary Flow of Dyed Water in Straight Microchannel Fabricated by PolymerBy Subhadeep Mukhopadhyay
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 →
-
Published Subscription
Recording of Surface-Driven Capillary Flow inside the Polymeric Microchannel Coated with Diamond like CarbonBy Subhadeep Mukhopadhyay
Abstract: In this experimental work, author has fabricated a single polymeric microfluidic device by maskless lithography, hot embossing lithography and direct bonding technique. Author has coated the diamond like carbon inside the microchannel by plasma enhanced chemical vapor deposition system. Author has recorded the surface-driven microfluidic flow of dyed water in the fabricated device. The meniscus profile is recorded during the surface-driven microfluidic flow. This research work may be useful to …
Published in Journal of Microelectronics and Solid State Devices · Vol. 7, Issue 3, 2020 · pp. 8–11 Read article →
-
Published Subscription
Short Report on Surface-driven Microfluidic Flow of Dyed Ethanol in Microchannel Bend Fabricated by Optically Transparent Polymer in Cleanroom EnvironmentBy Subhadeep Mukhopadhyay
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 →
-
Published Subscription
Short Review on Optofluidics as the Experimental Junction between Microfluidics and OpticsBy Subhadeep Mukhopadhyay
Abstract: AbstractAmong the present research-fields of fluid mechanics, optofluidics is one emerging topic towards the industrial applications. Appropriate experimental advancement of microfluidics is required to be integrated with optical components for the production of optofluidic devices and systems. In this particular review work, the theoretical and experimental research-work performed on surface-driven microfluidic flow is briefly mentioned. Also, the recent advancement of research on optofluidics is briefly mentioned. This review work may …
Published in Recent Trends in Fluid Mechanics · Vol. 7, Issue 2, 2020 · pp. 41–44 Read article →
-
Published Subscription
Review on the Inventions in Third Quantisation with the Possibility of Time-Machine to be implemented in the Indian-Space-Programmes under the Department of Space (Government of India)By Subhadeep Mukhopadhyay
Abstract: AbstractQuantum theory is the first quantisation, and quantum field theory is the second quantisation. Mukhopadhyay’s concept theory is the third quantisation in theoretical physics. Recently, few discoveries in third quantisation are performed and reported by Mukhopadhyay as author. In this review work, the inventions in third quantisation are summarised and briefly mentioned by Mukhopadhyay. Indian Space Research Organisation (ISRO) under the Department of Space (Government of India) has highly smart …
Published in Trends in Opto-electro & Optical Communication · Vol. 10, Issue 2, 2020 · pp. 26–31 Read article →
-
Published Subscription
Optical Recording of Surface-Driven Capillary Flow in Straight PMMA MicrochannelsBy Subhadeep Mukhopadhyay
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 →
-
Published Subscription
Optical Recording of Flow Phenomena in Photoresist based Microfluidic DevicesBy Subhadeep Mukhopadhyay
Abstract: AbstractIn this experimental work, a set of three individual SU-8 based glass microfluidic devices are fabricated by maskless lithography and indirect bonding technique without having any microfluidic leakage. Dyed ethanol (10% ethanol, 90% red dye) is prepared and used as dyed working liquid. The microfluidic leakage is observed in other set of two leaky microfluidic devices due to improper indirect bonding technique. The effect of surface-to-volume ratio on surface-driven capillary …
Published in Trends in Opto-electro & Optical Communication · Vol. 10, Issue 1, 2020 · pp. 36–42 Read article →
-
Published Subscription
Electrical Characteristics of Nanoelectronic Double-Heterojunction High Electron Mobility TransistorsBy Subhadeep Mukhopadhyay, Avrajyoti Dutta, Sanjib Kalita
Abstract: AbstractIn this work, a maximum drain current of 554 mA is achieved by the simulated structures of double-heterojunction HEMTs using the SILVACO-ATLAS software tool. The drain current is found to be higher at shorter gate length and at larger aluminium mole fraction. The drain current is also higher at larger thickness of AlGaN barrier layer and at larger doping concentration of AlGaN barrier layer.In this work, the formation of 2-DEG …
Published in Journal of Semiconductor Devices and Circuits · Vol. 7, Issue 1, 2020 · pp. 18–28 Read article →
-
Published Subscription
Recording of Surface-Driven Laminar Flow in Dual Sudden Expansion Microchannel of a Single SU-8 based Glass Microfluidic DeviceBy Subhadeep Mukhopadhyay
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 →
-
Published Subscription
Experimental Aspects of Surface-Driven Capillary Flow in MicrofluidicsBy Subhadeep Mukhopadhyay
Abstract: AbstractAt least one of the length, width or height must be less than one millimetre in any microchannel. The fluidic motion in any microchannel is called the microfluidic flow. Surface-driven capillary flow is also called the passive capillary flow in microfluidics. Polymers are common materials to fabricate the microfluidic devices. In this work, different aspects of surface-driven capillary flow are briefly explained. Surface-driven capillary flow has many bioengineering applications that …
Published in Recent Trends in Fluid Mechanics · Vol. 7, Issue 1, 2020 · pp. 15–19 Read article →
-
Published Subscription
Short Review on the Effects of Plasma Processing Techniques in PMMA Microfluidic DeviceBy Subhadeep Mukhopadhyay
Abstract: Abstract: The plasma processing techniques are useful for surface modifications on polymer surfaces. The appropriate surface modification alters the level of static contact angles on the polymer surfaces. The surface-driven microfluidic flow of suitable working liquid is sensitive to the static contact angle of microchannel surfaces fabricated by different polymers. Therefore, plasma processing techniques are suitable to vary the flow speed of working liquids in microfluidics. In future, this review …
Published in Recent Trends in Fluid Mechanics · Vol. 6, Issue 1, 2019 · pp. 20–22 Read article →
-
Published Subscription
Passive Capillary Flow of Aqueous Working Liquids in the PMMA Microfluidic Devices and SU-8 based Glass Microfluidic DevicesBy Subhadeep Mukhopadhyay
Abstract: Abstract: In this work, total 9 individual polymeric microfluidic devices are fabricated. The passive capillary flows of aqueous working liquids are studied in the fabricated polymethylmethacrylate (PMMA) microfluidic devices and SU-8 based glass microfluidic devices. All the microfluidic devices are fabricated inside the cleanroom laboratory. Dyed aqueous ethanol and dyed aqueous isopropyl alcohol (IPA) are the selected working liquids. CMOS camera is used to record each passive capillary flow in …
Published in Recent Trends in Fluid Mechanics · Vol. 6, Issue 1, 2019 · pp. 23–28 Read article →
-
Published Subscription
Variations of Source Current in the Double-Heterojunction HEMTsBy Subhadeep Mukhopadhyay, Sanjib Kalita
Abstract: AbstractIn this report, we have studied the variations in source current with respect to drain voltage corresponding to the double heterojunction (DH) high electron mobility transistors (HEMTs). Also, the effects of gate voltage and aluminium mole fractions on source current are studied. In this work, the highest source current achieved is 3.3 mA. This work may be useful to design many nanoelectronic HEMTs.Keywords: Source current, drain voltage, gate voltage, mole …
Published in Journal of Semiconductor Devices and Circuits · Vol. 3, Issue 3, 2016 · pp. 19–24 Read article →
-
Published Subscription
Simulation Studies on the Electrical Characteristics of Novel Nanoelectronic AlGaN/GaN/AlGaN Double-Heterojunction HEMTs for Industrial ApplicationsBy Subhadeep Mukhopadhyay, Sanjib Kalita
Abstract: AbstractWe report the drain characteristics of AlGaN/GaN/AlGaN double heterojunction (DH) high electron mobility transistors (HEMTs) with the associated quantum well depths. The drain current is higher corresponding to the larger doping concentration of AlGaN nano-layer. The drain current is higher with the larger gate voltage at any particular drain voltage. The quantum well depth is significantly higher with the increasing doping concentration of AlGaN nano-layer. About the novelty of this …
Published in Journal of Semiconductor Devices and Circuits · Vol. 3, Issue 3, 2016 · pp. 6–18 Read article →
-
Published Subscription
Simulation Studies on the Electrical Characteristics of High Electron Mobility TransistorsBy Subhadeep Mukhopadhyay, Sanjib Kalita, Ashish Prajapati, Susanta Sinha Roy, Jyoti Prasad Banerjee, James Andrew McLaughlin
Abstract: AbstractSimulation studies have been performed on the AlGaN/GaN high electron mobility transistor (HEMT) with AlN spacer layer. The current-voltage characteristics have been studied with respect to different gate voltages and different doping concentrations. Studies have been performed on the quantum well depth variation corresponding to the designed HEMTs.Keywords: Doping, drain current, drain voltage, quantum wellCite this ArticleSanjib Kalita, Ashish Prajapati, Susanta Sinha Roy, Jyoti Prasad Banerjee, James Andrew McLaughlin, Subhadeep …
Published in Journal of Semiconductor Devices and Circuits · Vol. 3, Issue 2, 2016 · pp. 32–36 Read article →
-
Published Subscription
Report on the Novel Electrical Characteristics of Microelectronic High Electron Mobility Transistors to Establish a Low-Cost Microelectronics Laboratory in the National Institute of Technology Arunachal PradeshBy Subhadeep Mukhopadhyay
Abstract: AbstractIn this work, total 22584 individual simulation-outputs are reported according to the performed simulation-studies on the microelectronic AlGaN/GaN high electron mobility transistors (HEMTs). This series of simulation work has been performed using the SILVACO-ATLAS software tool on the basis of already established theories related to the semiconductor-physics of HEMTs. In this work, the drain characteristics are investigated with respect to the aluminium mole fraction, drain voltage, gate voltage, gate length …
Published in Journal of Semiconductor Devices and Circuits · Vol. 4, Issue 2, 2017 · pp. 6–28 Read article →
-
Published Subscription
Simulation Studies on the Drain Characteristics of Microelectronic AlGaN/GaN HEMTs Corresponding to the 30 nm of AlGaN Nano-LayerBy Subhadeep Mukhopadhyay, Sanjib Kalita
Abstract: AbstractIn this work, the simulation studies are performed on high electron mobility transistor (HEMT) structures using the SILVACO-ATLAS software tool. The drain characteristics of HEMT structures is investigated with respect to the Aluminium mole fraction, drain voltage, gate voltage, and gate length at 30 nm thickness of AlGaN nano-layer. The simulation studies on the effect of gate length to control the drain characteristics are a novelty of this work. The …
Published in Journal of Semiconductor Devices and Circuits · Vol. 4, Issue 1, 2017 · pp. 8–16 Read article →
-
Published Subscription
Effect of Surface Wettability on the Surface-Driven Capillary Flow in SU-8 MicrochannelsBy Subhadeep Mukhopadhyay
Abstract: AbstractSU-8 microfluidic devices have been fabricated by the maskless lithography. Passive capillary flow is suitable to manipulate liquid in the lab-on-a-chip systems. The surface-driven capillary flow of dyed water in each microfluidic device has been recorded and analysed. The measured static water contact angles are 72.6°and 81.2° on the hydrogenated amorphous carbon (a-C:H) deposited flat surface and Si-a:C:H deposited flat surface respectively. Either, a-C:H or Si-a:C:H has been deposited on …
Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 2, 2016 · pp. 24–29 Read article →