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45 articles for “Lab-on-a-chip”
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Flow and Filtration of Polystyrene Microparticles in Micron-Scale Fluid Mechanics towards the Applications related to fluidic Microelectromechanical Systems
Abstract: Maskless lithography, hot embossing lithography and direct bonding technique are useful to fabricate the polymethylmethacrylate (PMMA) microfluidic devices. Also, maskless lithography and indirect bonding technique are useful to fabricate the SU-8 based glass microfluidic devices. In this work, a short review on microfluidic flow and microfluidic filtration of microparticles is provided by author related to the micron-scale fluid mechanics. This review may be useful to perform the blood filtration in …
Published in Journal of Microelectronics and Solid State Devices · Vol. 8, Issue 3, 2021 · pp. 36–41 Read article
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Effect of Surface Free Energy on the Surface-Driven Capillary Flow in SU-8 based Glass Microfluidic Devices
Abstract: Surface-driven capillary flow of dyed water is recorded in the SU8 based glass microfluidic devices fabricated by the standard cleanroom processes. The effect of surface wettability on the surface-driven capillary flow is studied in the individual SU8 based microfluidic devices of glass bottom wall and polyimide bottom wall. The surface-driven capillary flow is faster on the glass bottom wall surface due to the higher polar component of solid surface free …
Published in Journal of Polymer & Composites · Vol. 4, Issue 3, 2016 · pp. 1–7 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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Surface-Driven Capillary Flow of the Dyed Aqueous Ethanol in a single SU-8 based Glass Microfluidic Device integrated with the Arrays of Square Polyimide Micropillars
Abstract: In this work, a single SU-8 based glass microfluidic device is fabricated by the maskless lithography and indirect bonding technique. A particular polyimide layer at the selected portions and the arrays of square polyimide micropillars at the other portions are integrated on the microchannel bottom wall by the maskless lithography. Dyed aqueous ethanol (70% dyed water, 30% ethanol) is prepared as the working liquid in this work. A CMOS camera …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 6, Issue 1, 2019 · pp. 33–37 Read article
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Educational Review on the Applications of Diamond-Like Carbon Films in Fluid Engineering
Abstract: In this present review paper, author has described the applications of diamond-like carbon (DLC) films in microfluidic devices from the point of view of materials-science. According to author’s earlier reports, the speed of surface-driven water flow is varied by the coating of DLC films in PMMA microfluidic devices. Also, according to author’s earlier reports, the speed of surface-driven water flow is varied by the coating of DLC films in SU-8 …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 6, Issue 3, 2019 · pp. 1–7 Read article
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Experimental Demonstration on Microfluidic Capillary Flow of Red Dye in Photoresist based Glass Microfluidic Devices
Abstract: In this experimental work, a set of three individual SU-8 based glass microfluidic devices are fabricated by maskless lithography and indirect bonding technique in leakage-free conditions. Commercially available red coloured food dye is used as the selected working liquid. The microfluidic leakage in other set of two leaky microfluidic devices is experimentally demonstrated. Microfluidic devices should be fabricated at leakage-free conditions to achieve exact fluid flow characteristics. The effect of …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 7, Issue 1, 2020 · pp. 1–7 Read article
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Experiments to Control the Surface-Driven Microfluidic Flow of Dyed Water in Straight PMMA Microchannels Fabricated by Maskless Lithography, Hot Embossing Lithography and Direct Bonding Technique
Abstract: Total six individual straight microchannels are fabricated by maskless lithography, hot embossing lithography and direct bonding technique using author’s own hands-on completely inside the cleanroom laboratory. Polymethylmethacrylate (PMMA) is the selected polymeric material to fabricate these straight microchannels. Dyed water is prepared as working liquid to record and study the microfluidic flow characteristics inside these fabricated microchannels. Air dielectric barrier discharge (DBD) plasma processing is the surface modification technique in …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 7, Issue 1, 2020 · pp. 17–23 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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Report on Microfluidic Flow of Dyed Working Liquids inside the Polymeric Devices
Abstract: In this experimental work, a single SU-8 based glass microfluidic device is engineered by the maskless lithography and indirect bonding technique. Also, total nine individual polymethylmethacrylate (PMMA) based microfluidic devices are fabricated by maskless lithography, hot embossing lithography, and direct bonding technique. Dyed ethylene glycol, dyed ethanol, and dyed aqueous isopropyl alcohol (50% water, 50% IPA) are prepared and used as working liquids to record each surface-driven microfluidic flow. The …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 8, Issue 1, 2021 · pp. 22–29 Read article
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Short Review on the Effects of Plasma Processing Techniques in PMMA Microfluidic Device
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
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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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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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Effect of Surface Wettability on the Surface-Driven Capillary Flow in SU-8 Microchannels
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
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Optical Recording of Flow Phenomena in Photoresist based Microfluidic Devices
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
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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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Design And Optimization Of Performance Parameters Of Indirect Solar Drying System
Abstract: The objective of the work being presented is to design and develop an indirect solar dryer in the renewable energy laboratory of Mechanical Engineering Department, I.I.T BHU Varanasi and evaluate its performance under the climatic conditions of Varanasi, U.P India. The main components of indirect solar dryer are flat plate solar collector, drying chamber, blower and other accessories of the drying system. Originally built Shukla-Sharma dryer for drying aonla was …
Published in Journal of Thermal Engineering and Applications · Vol. 8, Issue 1, 2021 · pp. 1–22 Read article
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The Integration of Machine Learning in VLSI IC Design
Abstract: It represents the first use of AI in the domain of integrating circuits, which has been impacted by it. The conventional VLSI design process that is now in use is replaced by this technology. The laborious manual concepts created by people have been replaced with automated design innovations. This development would trigger a profound change in the fields of AI education and hardware computation. With the introduction of contemporary chips, …
Published in Trends in Machine design · Vol. 11, Issue 2, 2024 · pp. 1–8 Read article
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Design and Fabrication of Semi-Automated Sugarcane Bud Chipper
Abstract: In today's competitive world, the production of agricultural products has to be accelerated. Agriculture is the particle of India. Almost all farmers in India face the problem of labor shortage. Wages of wages are increasing day by day, and agricultural products are increasing in the same way. The purpose of this project is to design and manufacture semi-automatic grinding machine of sugarcane buds for agriculture. To increase the efforts of …
Published in Journal of Mechatronics and Automation · Vol. 7, Issue 2, 2020 · pp. 14–16 Read article
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Awareness About Lifestyle Diseases Associated Risk Factors in School Going Children in Delhi
Abstract: Lifestyle means a pattern of individual practices and personal behavioral choices that are related to elevated or reduced health risk. The diseases which primarily arise from the abnormal lifestyle of a person are grouped under the term “Lifestyle Diseases”. For younger population, the risk of lifestyle disease looms larger. Therefore, this paper aimed to find the prevalence and awareness of lifestyle disease related risk factors in school going children aged …
Published in Journal of Nursing Science & Practice · Vol. 1, Issue 1-2, 2011 · pp. 11–20 Read article