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Showing 1 to 20 of 248 for “"Zinc oxide"”.
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Plasma Treatment of Zinc Oxide Thin Film and Temperature Sensing Using the Zinc Oxide Thin Film
<p>Zinc oxide is a direct and wide bandgap, II-VI semiconductor. It has large exciton binding energy, large piezoelectric constant, strong luminescence, and high thermal conductivity. These properties make zinc oxide as a suitable material for various optoelectronic applications. Vacuum based …
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Nanowire Zinc Oxide MOSFET Pressure Sensor
… new kind of pressure sensor using self-assembly Zinc Oxide (ZnO) nanowires on top of the gate of a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) is presented. Self-assembly ZnO nanowires were fabricated with a diameter of 80 nm and 800 nm height (80:8 aspect ratio) on top of the gate …
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Electrically active defects in zinc oxide
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
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The agglomeration of zinc oxide powders
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1962.
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Zinc oxide nanophotonics : toward quantum photonic technologies
Zinc oxide (ZnO) is a large bandgap (3.37 eV at room temperature) semiconductor and is a good candidate for short wavelength photonic devices such as laser diodes. A large exciton binding energy (60 meV) at room temperature in addition to the advantages of being able to grow various nanostructure …
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Light Emission from Zinc Oxide Nanoforest Plasma
<p>Zinc oxide (ZnO) nanorods were grown through chemical bath deposition tech- nique on different substrates, such as highly p-doped silicon microstructures, low p-doped silicon and silicon dioxide. High voltage (up to 80 V) induced plasma formation is reported with high intensity arcs of …
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The growth and characterisation of ordered arrays of zinc oxide nanostructures and optical studies of defects in zinc oxide
In this work the growth of c-axis aligned zinc oxide nanorods on non-epitaxially matched substrates is examined. Nanorod arrays were deposited on silicon by seeding and chemical bath deposition (CBD), carbothermal vapour phase transport (CTR-VPT) and a hybrid CBD / CTR-VPT method. The best optical …
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On the growth and characterisation of Zinc Oxide
Optical, electrical and structural properties of ZnO grown via grown via PLD and VPT were examined. Both growth techniques were successful in producing nanostructured ZnO with thin films also produced with PLD. An epitaxial relationship to the substrate was found for all materials. A …
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The oxidation of carbon monoxide on zinc oxide
… of the kinetics of the oxidation of carbon monoxide to form carbon dioxide. The catalyst was high purity zinc oxide. A liquid nitrogen trap was used to remove the product carbon dioxide, thereby virtually eliminating any poisoning effect of CO2 on the reaction. A natural convection loop …
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Electronic Structures of Cadmium Sulfide and Zinc Oxide
… is found in the calculations of the zinc-blende form. Energy band calculations are performed on zinc oxide to determine its electronic structure, and the computed bands agree with optical measurements of the valence bands.
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Activated sintering of bismuth-doped zinc oxide ceramics
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1982.
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Numerical Simulation of Microwave Sintering of Zinc Oxide
… center and propagates towards the surface of a zinc oxide sample, when heated in a microwave cavity without the presence of oxygen. This effect is believed to be caused by the irregular temperature dependence of the dielectric properties of zinc oxide, particularly dielectric loss. Two …
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Flexible nano-memory device by zinc oxide nanorod arrays
… flexibility. First, controllable synthesis of zinc oxide (ZnO) nanorod/nanowire (NR/NW) is the prerequisite to provide desired nanomaterials and nanostructures, the effect from substrate roughness is the key to grow well-aligned three-dimensional (3D) ZnO nanostructures for fabricating …
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Experimental studies of zinc oxide and silica peptide interactions
… by in vitro studies. The minerals; crystalline zinc oxide (ZnO) and amorphous silica (SiO2) and their specific binding peptides identified by phage display were chosen for this investigation. Firstly, the growth of ZnO was investigated via a hydrothermal synthesis route. Product formation, …
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Surface-mediated mechanisms for defect engineering in zinc oxide
… the defects it contains. In semiconducting metal oxides like zinc oxide, the concentration and diffusion of oxygen point defects, like interstitials and vacancies, play a central role in various physical phenomena, such as gas sensing, bipolar switching, photoluminescence and photocatalysis. …
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Zinc oxide nanowire field effect transistors for sensor applications
… were fabricated using solution based precursor zinc neodecanoate. A range of ZnO thin films were prepared by varying process parameters, such as precursor concentrations and annealing temperatures, and then analysed for their optical and electrical characteristics. ZnO TFTs prepared from a 15 % …
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Properties and sensor performance of zinc oxide thin films
Reactively sputtered ZnO thin film gas sensors were fabricated onto Si wafers. The atmosphere dependent electrical response of the ZnO micro arrays was examined. The effects of processing conditions on the properties and sensor performance of ZnO films were investigated. Using AFM, SEM, XRD and …
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