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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 21 for “"ZnO nanorods"”.
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Synthesis, Field Emission and Associated Degradation Mechanisms of Tapered ZnO Nanorods
… and Associated Degradation Mechanisms of Tapered ZnO Nanorods</strong></p> <p>Gregory Michael Wrobel, M.S.</p> <p>University of Connecticut, 2011</p> <p>Modern development of field emitter arrays (FEA) has been made possible, partly thanks to the synthesis and development of one-dimensional (1D) …
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Hydrothermally grown Pb2+ doped ZnOnanorods for hydrogen and acetylene gas sensing
Randomly orientated ZnO nanorods were deposited hydrothermally on Si <100> wafers. The precursor solutions used for ZnO nanorods deposition were zinc chloride + aqueous ammonia and Zinc nitrate + HMT. ZnO nanorods were deposited on Si<100> wafers to establish the optimal PH and concentration which …
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Synthesis of zinc oxide nanorods: seed layer annealing effect on electrical conductivity
Orientation of zinc oxide nanorods has a vital role in the performance of nanoscaled-based optoelectronic devices and biosensing. In spite of a lot of research, there is no clear mechanism for the growth and orientation of ZnO nanorods during hydrothermal deposition. Beside the other properties of …
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Mechanical and Electrical Characterization of Carbon Fiber/Bucky Paper/Zinc Oxide Hybrid Composites
… several nano reinforcements such as zinc oxide nanorods (ZnO) and carbon nanotubes (CNTs). Zinc oxide is semi-conductor with good piezoelectric and pyroelectric properties. These properties could be transmitted to CFRPs when a nanophase of ZnO is embedded within CFRPs. In lieu of ZnO nanorods, …
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Growth and characterization of carbon nanostructures on zinc oxide nanostructures
… synthesize different hybrid materials based on ZnO and carbon hierarchical nanostructures, and to test their performances when used as chemiresistors to detect low doses (~ ppm) of polluting gases, like ammonia and acetone. Nanostructures of ZnO and carbon, including carbon nanotubes, exhibit on …
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Fatigue, Fracture and Impact of Hybrid Carbon Fiber Reinforced Polymer Composites
… out-of-plane performance of CFRPs. Zinc oxide (ZnO) nanorods are other nano-sized reinforcing structures which can hybridize the CFRPs via their radially growth on the surface of carbon fibers. Among all the reported methods for synthesizing ZnO nanorods, hydrothermal technique is the most …
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Zinc Oxide Nanorod Based Ultraviolet Detectors with Wheatstone Bridge Design
… metal semiconductor-metal (MSM) zine oxide (ZnO) nanorod based ultra-violet (UV) detectors having a Wheatstone bridge design with a high</p> <p>responsivity at room temperature and above, as well as a responsivity that was largely independent of the change in ambient conditions. The ZnO …
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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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Design and Development of Sustainable, Low-Cost, High-Performance Nanomaterials for Thermoelectric and Solar Hydrogen Applications
… first class of materials explored was Al-doped ZnO nanorods exhibited strong n-type thermoelectric behaviour with a ZT of 1.37 at 340 K, while CuI showed p-type performance with a ZT of 0.72 at 340 K. Integration into a thermoelectric glazing (TEGZ) prototype produced 14 mV at 340 K and a …
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Enhancement of the UV emission in metal nanoparticle-coated ZnO
… increases in ultra-violet (UV) luminescence in ZnO have been reported, due to the presence of a surface coating of either Au or Al nanoparticles. Two significantly different models have been proposed to explain the observed increase in the UV light output. One involving the decay of metal …
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Synthesis and characterisation of hybrid Zn0-carbon nanostructures for potential applications in hydrogen storage
… of hybrid zinc oxide carbon nanofibers (ZnO-CNFs) using ZnO nanorods as template and to investigate if they can be used as the hydrogen storage materials. The synthesis of ZnO nanoparticles (ZnO NPs) was carried out using direct current (DC) reactive magnetron sputtering at different …
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Kinematics of Inter-Ply Interfaces In Composite Manufacturing
… interrupted cure and interface modification with ZnO nanorods experiments are developed to reduce these processing- induced residual stresses and thereby increase laminate strength. The experimental results are validated through thermomechanical modeling of the composite cure process.</p>
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Investigations on Nanomaterials For Potential Biomedical Applications
… nanotubes (CNTs), graphene and Zinc Oxide (ZnO) nanofibers have led to several opportunities in biomedical research and clinical applications. The current and most promising applications of these nanomaterials include, but are not limited to, drug delivery, in vitro diagnostics, in vivo …
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TI Nano Powder Speckle Pattern Creation and Use in DIC of ZnO Modified Single Carbon Fibers
… modifying carbon fibers by growing zinc oxide (ZnO) nanorods in the fiber surface using a hydrothermal approach, increasing interfacial area and fiber-matrix friction. Macroscale evaluation has shown that the interfacial modification decreases the inter-ply movement and reduces the processing …
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Formation Mechanisms and Photocatalytic Properties of ZnO-Based Nanomaterials
Zinc Oxide (ZnO) is one of the most extensively studied semiconductors because of its unique properties, namely, its wide band gap (3.37 eV) and high excitation binding energy (60 meV). These properties make ZnO a promising material for uses in a broad range of applications including sensors, …
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Metal oxide heterostructured films with controlled architecture for enhanced photocatalytic properties
… of semiconductor/semiconductor (p-n type, NiO/ZnO) and metal/semiconductor (metal/n- type, RuO2/ZnO) heterostructures using systematic (step-by-step) interface studies, in order to gain knowledge regarding the influence of ZnO surface cleaning in the interfacial band bending, thereby analyzing …
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Growth and characterization of ZnO and related nanostructures
Zinc oxide (ZnO) nanostructures exhibit unique optical properties which makes them potential candidates for optoelectronic device applications. It is very important for various applications to be able to control morphology of low dimensionality nanostructures. In the first part of this thesis, …
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Design of Cotton Fabric-Based Binary and Ternary Composite Materials Containing Nanostructured ZnO, TiO2, and Plasmonic Nanoparticles: Photocatalytic Applications
… (IV) oxide (TiO<sub>2</sub>) and zinc oxide (ZnO) have received much attention due to their chemical stability, non-toxicity, low-cost, and high catalytic activity. In this report, we design binary and ternary composite materials on cotton fabric (CF) namely CF@TiO<sub>2</sub>-AuNPs, and …
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Properties of Type-II ZnTe/ZnSe Submonolayer Quantum Dots Studied via Excitonic Aharonov-Bohm Effect and Polarized Optical Spectroscopy
… chapters I show my achievement on the growth of ZnO nanorods as a core for type-II 1D systems and propose an outlook for future research on the type-II semiconductor heterostructures.</p>
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Metal oxide nanostructures and their applications
… metal oxide nanostructures, i.e. zinc oxide (ZnO) and iron oxide (α-Fe2O3). The thesis highlights the development of novel synthesis techniques/procedures which are rapid, consume less energy and time, and are less cumbersome, more economical, especially because of the low temperature process. …
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