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164 articles for “optical”
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Recent Developments in Nanosensors for Biomedical Applications
Abstract: In recent years, nanosensors have become increasingly popular due to their potential applications in various biomedical fields. These sensors have the ability to detect various biomolecules, ions, and pathogens at the nanoscale level, which is crucial in disease diagnosis and monitoring. The purposeof this article is to provide a comprehensive review of the latest developments in nanosensors for biomedical applications. We focus on the different types of nanosensors, including optical, …
Published in International journal of Nanobiotechnology · Vol. 8, Issue 2, 2022 · pp. 16–20 Read article
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Blue Shift of Sol-gel Synthesized ZnO Nano-particles: Size Dependent Quantum Confinement Effect
Abstract: Zinc oxide nano-crystals with different size and shape were synthesized by sol-gel technique at 90°C. ZnO nano-particles show (100), (002), (101), (102), (110), and (103) crystalline orientation and strong band-edge emission at 408 nm. Grain size of ZnO nano-crystals varies from 4 nm to 20 nm due to variation of molar ratio of polyethylene glycol with zinc acetate during synthesis. ZnO nano-materials with grain size 4 nm and 8 nm …
Published in International Journal of Nanomaterials and Nanostructures · Vol. 1, Issue 1, 2015 · pp. 8–15 Read article
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Controlled Texture of Magnetron Sputtered Transparent Conducting ZnO: Al Films for Solar Cell Applications
Abstract: Textured transparent and conducting ZnO:Al films were prepared by rf-magnetron sputtering on glass substrate at a temperature 3500C under Ar and Ar+O2 gas ambient. ZnO:Al thin films shows a minimum electrical resistivity of (~8.210-4 Ω-cm), and high optical transmittance (T~86–90% average) in visible region. With increasing of oxygen concentration ZnO:Al films become more compact, stoichiometric and becomes more electrically resistive. ZnO:Al shows hexagonal wurtzite polycrystalline structure with strong (002) orientations. …
Published in International Journal of Nanomaterials and Nanostructures · Vol. 1, Issue 2, 2015 · pp. 12–19 Read article
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The Existence of Two States in Liquid Water and Its Impact on Biological and Nanoscopic Systems Around Us
Abstract: This work reviews several properties of liquid water, including the dielectric constant and the proton-spin lattice relaxation, and draws attention to a bilinear behavior defining a crossover in the temperature range 50 ± 10°C between two possible states in liquid water. The existence of these two states in liquid water plays an important role in nano-metric and biological systems. For example, the optical properties of metallic (gold and silver) nanoparticles …
Published in International Journal of Nanomaterials and Nanostructures · Vol. 3, Issue 1, 2017 · pp. 16–21 Read article
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Study the properties of spin-coated Co-doped ZnO (CZO) thin Film
Abstract: Co doped ZnO (COZ) nanoparticles were prepared by spray pyrolysis technique followed by annealing at three different temperatures. XRD, UV- Vis spectroscopy, Photoluminescence (PL) studies, Scanning electron microscopy (SE), and vibrating sample magnetometry (VSM) studies were made to analyze the structural, optical and magnetic properties. XRD pattern confirmed the improved crystallinity after annealing and the formation of hematite phase. A UV-visible spectrum indicates that the nanoparticles exhibit the blue shifting …
Published in International Journal of Nanomaterials and Nanostructures · Vol. 3, Issue 2, 2017 · pp. 26–35 Read article
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A Review: Properties and application of Graphene
Abstract: The paper focusses mainly on the different properties of graphene such as electronics, optoelectronics, mechanical, biological and optics. The thermal and electrical conductivity has been described and compared to other metals briefly. The article includes the various optoelectronic applications of graphene and its advantage over other metal oxide nanoparticles. The biological applications of graphene illustrate the area of biosensing devices for various treatments. This paper also involves the studies of …
Published in International Journal of Nanomaterials and Nanostructures · Vol. 4, Issue 2, 2018 · pp. 6–16 Read article
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Chemical Synthesis & study of Silver Nano Particles
Abstract: Silver nanoparticles easily interact with other particles and increases their antibacterial efficiency furthermore due to their attractive chemical, physical and optical properties has received considerable attention of the researcher. In this paper silver nanoparticles were synthesized by chemical reduction method using silver salt AgNO3 and using reducing agent NaBH4. The borohydride anions were adsorbed onto silver nanoparticles and addition of PVP prevented the aggregation of silver nanoparticles. A yellow colour …
Published in International Journal of Nanomaterials and Nanostructures · Vol. 5, Issue 1, 2019 · pp. 12–17 Read article
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Nanolithography: A Promising Tool for Precision Nanofabrication
Abstract: Nanolithography is a crucial technique in nanofabrication that involves patterning materials on a manometer scale. With the increasing demand for smaller, faster, and more efficient electronic devices, nanolithography has become an indispensable tool in the semiconductor industry, where it is used to create structures for integrated circuits, sensors, and other nanoelectronic components. The two main types of nanolithography are top-down and bottom-up approaches. In top-down lithography, a bulk material is …
Published in International Journal of Nanomaterials and Nanostructures · Vol. 8, Issue 2, 2022 · pp. 14–21 Read article
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Advancements of Carbon Quantum Dot and their use in Biomedical
Abstract: Carbon quantum dots (CQDs) have gained significant attention in the biomedical field due to their unique physicochemical properties and potential biomedical applications. In this review, we provide a comprehensive overview of recent advancements in CQD synthesis, functionalization, and their use in biomedical applications. Firstly, we discuss various synthetic methods used to produce CQDs, including microwave-assisted synthesis, hydrothermal synthesis, and electrochemical synthesis. Next, we delve into the functionalization of CQDs, which …
Published in International Journal of Nanomaterials and Nanostructures · Vol. 8, Issue 2, 2022 · pp. 28–33 Read article
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A Review of Quantum Dots in Bioimaging and Photodynamic Therapy.
Abstract: Quantum dots, as semiconductor nanostructures, have garnered substantial interest due to their distinct optical properties and adjustable size, making them valuable in various fields like electronics and biomedicine. These nanostructures exhibit remarkable versatility as contrast agents in bioimaging and play a crucial role in photodynamic therapy for diagnosing diseases. This article gives an overview of the use of quantum dots in bioimaging and photodynamic therapy, highlighting recent advancements and addressing …
Published in International Journal of Nanomaterials and Nanostructures · Vol. 9, Issue 1, 2023 · pp. 11–17 Read article
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Review on Gold Nanoparticles and Their Applications
Abstract: Gold nanoparticles are attention because of the outstanding properties (e.g., size and shape depending optical, electrical, and magnetic properties) which can be included into antimicrobial applications, biosensor materials, composite fibers, cryogenic superconducting materials, cosmetic products, and electronic components The properties of Au NPs are different from their bulk form due to the increased surface-to volume ratio determined by the assembly of the Au NPs and the inter-particle interaction. This review …
Published in International Journal of Composite and Constituent Materials · Vol. 4, Issue 2, 2018 · pp. 32–39 Read article
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Nanocomposites: The Fusion of Nanotechnology and Composite Materials
Abstract: Nanocomposites, resulting from the integration of nanotechnology and composite materials, have emerged as a cutting-edge class of materials with exceptional properties and multifunctional capabilities. This article presents a concise overview of the principles, fabrication methods, and diverseapplications of nanocomposites, highlighting their profound impact on numerous industries. By harnessing the power of nanotechnology, nanocomposites offer precise control over material structure and properties at the nanoscale. Through the incorporation of nanoscale reinforcements, …
Published in International Journal of Composite and Constituent Materials · Vol. 9, Issue 1, 2023 · pp. 43–50 Read article
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Assessment of Tensile and Hardness Property of AA5083/Nano-Al2O3 Metal Matrix Composites
Abstract: Al–Mg base composites reinforced with different mixtures of nano-Al2O3 particles have been fabricated by mechanical stir casting and their metallurgical and mechanical characterization has been investigated. In this investigation, the Al2O3 particulates were reinforced into the base matrix of aluminium fabricated with five levels of volume fraction such as Al/0 vol.% Al2O3, Al/2 vol.% Al2O3, Al/4 vol.% Al2O3, Al/6 vol.% Al2O3 and Al/8 vol.% Al2O3. After the Al-base-nano-composites were fabricated …
Published in International Journal of Composite Materials and Matrices · Vol. 1, Issue 1, 2015 · pp. 28–34 Read article
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Sliding wear behavior of plasma sprayed NiCrAlY-WC based composite coatings on AA5083 alloy
Abstract: WC based coatings was deposited by thermal spray process have been extensively used in industrial application to counter abrasive type of wear. In this study, for the first time NiCrAlY-WC based composite coatings were deposited on AA5083 substrate by plasma sprayed coating technique. The composite coatings were characterized by optical microscopy (OM), scanning electron microscopy (SEM) and microhardness. Sliding wear behavior of coated and uncoated samples was carried out on …
Published in International Journal of Composite Materials and Matrices · Vol. 4, Issue 2, 2018 · pp. 21–26 Read article
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Useful Medicinal Operative: Innovative Formulation of Zoloft
Abstract: A highly effective antidepressant is active metabolite hydrochloride. Zoloft is one of those drugs with one or even more asymmetrical centres where the biological effects of the isomers vary significantly from one another. Depression, dependence, and other anxiety-related illnesses are all treated with sertraline hydrochloride, which selectively blocks serotonine reuptake. The preferred configurations should typically be created as early as feasible in the biosynthesis of sertraline, which has two asymmetric …
Published in International Journal of Composite Materials and Matrices · Vol. 8, Issue 1, 2022 · pp. 19–22 Read article
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Deposition and characterization of poly(o-anisidine)/TiO2Nanocomposite for gas sensing application
Abstract: The Poly(o-anisidine) (POA) and Titanium dioxide POA (POA/TiO2 ) composite thin film based for gas sensing application are synthesized. Pure POA and POA/TiO2 composites with 20wt% of TiO2 were synthesized by chemical oxidative polymerization of o-anisidine using ammonium persulfate in acidic medium at 0-50C. Thin films of POA and POA/TiO2 composites were deposited on glass plate by dip coating method to prepare the chemiresistor sensor. The structural and optical properties …
Published in International Journal of Polymer Science and Engineering · Vol. 1, Issue 1-2, 2015 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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Aerogel to Study Nano-composite
Abstract: This article has linked to economic aerogel utility of build as by apply of thermal insulation from high and low temptation than usual subscription. Aerogel for building construction always esteemed to be damp proof reticulated architected formation. Space mission is inclusive afterwards as an energy absorber. Typified composite form mostly subjected to class as notified form after solidification on drying gelatinous composes from carbon, clay and silica. Multifunctional material characteristics …
Published in International Journal of Polymer Science and Engineering · Vol. 7, Issue 1, 2021 · pp. 1–10 Read article
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Study of PLA and its Synthesis Kinetics
Abstract: In this project we studied about Polylactic Acid and its production kinetics. The most often found optically active hydroxycarboxylic acid is lactic acid (LA, also known as 2-hydroxypropionic acid). In the form of L-and D-Lactic Acid, this chiral molecule may be found. The building blocks of polylactide are carboxylic acid monomers produced by fermentation of sugars from renewable sources, such as sugar cane, beet root, or corn starch. These sugars …
Published in International Journal of Polymer Science and Engineering · Vol. 8, Issue 1, 2022 · pp. 16–27 Read article
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Preparation of PMMA Nanoparticles in Different Ways and Studying the Effect of Some Factors on Changing Its Properties
Abstract: Poly(methyl methacrylate) (PMMA) is usually made with the help of radical polymerization, coordination polymerization, and methyl methacrylate acid esterification. Due to its hardness, PMMA is widely used in the medical sciences, optical materials, electronics, and automotive industries. The present study aims to fabricate PMMA nanoparticles using different chemical methods such as sol-gel polymerization, co polymerization, etc. Various aspects of the synthesis process will be changed, such as temperature, reaction time, …
Published in International Journal of Polymer Science and Engineering · Vol. 8, Issue 2, 2022 · pp. 37–43 Read article