Global ETD Search
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 37 for “"Multilayer structures"”.
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Estimating The Thermal Properties Of Thin Film And Multilayer Structures Using Photothermal Deflection Spectroscopy
… for the calculation of the thermal field in a multilayer structure resulting from periodic laser heating. The model incorporates the effects of anisotropic thermal conductivity, interlayer thermal contact resistance, and volumetric optical-to-thermal energy conversion. temperature field is used …
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Nanocomposite of ZrO2/Polymer Thin-Film Coatings by the Ionically Self-Assembled Monolayer Technique
Nanocomposites of multilayer structures of zirconia/polymer thin-film coatings have been fabricated on quartz and single-crystal silicon substrates by the Ionically Self-Assembled Monolayer (ISAM) technique. Particle size distribution was measured to calculate the grain diameter of the zirconia …
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Electrodeposition of FeCoNiCu quaternary system
… and theoretically, for fabrication of multilayers, grating structures, and nanowires. Multilayer structures are composed of alternating ferromagnetic and nonmagnetic nanometric layers, and are of interest due to the giant magnetoresistance (GMR) property it possesses, a change in …
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Study of Triplet Exciton Dynamics in Small Organic Molecule Films Using Time Resolved Optical Spectroscopy
… of triplet transport in single layer and multilayer films can be crucial in improving the efficiency of organic light emitting devices and solar cells. This thesis reports an investigation of triplet exciton dynamics in small organic molecule single and multilayer layer films using optical …
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Noble-metal quantum well structures: A theoretical and experimental study
… there is a great deal of interest in metallic multilayer systems, in particular magnetic multilayer structures, for both technological and scientific reasons. Since the growth properties and band structures for these systems are, in general, quite complicated, most current research is directed …
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Photon management in thermal and solar photovoltaics
… are discussed, including photon transport in multilayer structures, measurement of near-field thermal radiation, optical absorption in silicon nanowire structures, surface-plasmon enhanced near-bandgap optical absorption in silicon, and selective absorber surface for solar thermal …
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Structure and epitaxy studies of cobalt silicide/silicon heterostructures
… the CoSi $\to$ CoSi$\sb2$ phase transformation. Multilayer Si$\sb{\rm a}$/Co/Si$\sb{\rm c}$ thin film deposition is an effective processing technique for controlling microstructure and preventing pinhole formation by promoting uniform interfacial silicide growth. Epitaxial pinhole free CoSi$\sb2$ …
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Static and ultrafast optical properties of nanolayered composites : gold nanoparticles embedded in polyelectrolytes
… of this thesis gold nanoparticle/polyelectrolyte multilayer structures were prepared, characterized, and investigated according to their static and ultrafast optical properties. Using the dip-coating or spin-coating layer-by-layer deposition method, gold-nanoparticle layers were embedded in a …
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ENGINEERING THERMAL CONDUCTIVITIES FOR ENERGY APPLICATIONS
… innovations in thermal management materials and structures. Thermal conductivity engineering stands at the forefront of these innovations, aiming to optimize the transfer or insulation of heat for various energy applications. This dissertation explores the frontier of thermal conductivity …
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Transparent Conductors based on Ag Nanolayer embedded in Semiconductor Oxides
… a detailed discussion of the basic electronic structures and optical properties of TCO materials emphasizing the key properties giving them some unique properties. Chapter 3: it treats of very thin TCO/Ag/TCO multilayer structures grown by RF magnetron sputtering. Synthesis and properties of …
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Investigation of implantation damage in aluminum gallium arsenide/gallium arsenide heterostructures using ion channeling and transmission electron microscopy
… behavior of GaAs/Al$\sb{0.6}$Ga$\sb{0.4}$As multilayer structures has been investigated by implanting samples with 1 MeV Kr$\sp+$, 1.5 MeV Kr$\sp+$, 1 MeV Ar$\sp+$, and 1.5 MeV Kr$\sp{++}$ at 77 K. The resulting damage state was analyzed using low-, room-, and high-temperature Rutherford …
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Thermo-optic Phase Spectroscopy techniques for multiscale thermal conductance characterization in semiconductor integrated circuits
… speed. A unified modeling framework accommodates multilayer structures with anisotropic thermal expansion and elastic constants. Experimental validation demonstrates TOPS’s ability to extract thermal conductivity and thermal boundary conductance with improved accuracy and reduced acquisition time …
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Pick-and-place nanoassembly
… direct fabrication of nanometer-scale planar and multilayer structures using the probe tip of an atomic force microscope (AFM) and a material reservoir is proposed. The process, which is called Pick-and-Place NanoAssembly, enables true "pick-and-place" retrieval and deposition of materials with a …
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Design and fabrication of planar inductors for inductive proximity sensors
… the design and fabrication of coils using multilayer ceramic technologies common in the manufacturing of hybrid microelectronics components and circuits. As another alternative, multilayer structures utilizing polymer materials and fabrication techniques common to the printed circuit board …
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Optical studies of current-induced spin-orbit effects in magnetic systems
… demonstrate self-spin-orbit torque (SSOT) in multilayer systems lacking traditional nonmagnetic spin-source materials. A simple and accurate SOT characterization approach is important not only for scientific research, but also for industrial product development. We develop a SOT magnetometer …
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Hypersonic phononic crystals
… simulations. This set of relatively simple multilayer structures represents an excellent platform to gain a basic understanding of phononic band gap phenomena. In addition, their in-plane phonon dispersion is used to extract information about the elastic constants and glass transition …
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Growth and Characterization of Type-II Submonolayer ZnCdTe/ZnCdSe Quantum Dot Superlattices for Efficient Intermediate Band Solar Cells
… Upon optimizing growth conditions for ZnTe/ZnSe multilayer quantum dot systems, the growth parameters were modified so as to obtain various ZnCdTe/ZnCdSe samples grown on InP substrates. An extensive characterization has been performed to investigate structural, optical as well as electrical …
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Wideband electrical characterization of multilayer low-loss dielectric materials
… of low-loss dielectric materials used in multilayer structures. The materials include Pyralux®, a polymer, and Green Tape™, a low-temperature co-fireable tape ceramic (LTCC). The study is composed of three main tasks. First, the effects of operating temperature and relative humidity on the …
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Ultra-thin transparent electrodes for energy applications
… zinc oxide (AZO) films and very thin multilayers of AZO/Ag/AZO have emerged as a very promising alternative . In particular, AZO films are Indium-free and show electro-optical properties comparable to ITO films of the same thickness (700-900 nm for industrial applications), especially …
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Pulsed laser deposition of thick multilayer garnet crystal films for waveguide laser devices
… pulsed laser deposition (PLD) to fabricate thick multilayered garnet crystal planar waveguides with rare-earth ion doped cores for use as planar waveguide laser devices. Planar waveguides are of interest because of the implications of their structure, which allows for lasing, pumping and heat …
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