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 36 for “"Film structures"”.
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Hybrid organic/quantum dot thin film structures and devices
… between inorganic QDs and organic thin films.
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Studies on Optically Induced DC-Voltage in Thin Film Structures
… of the proposed devices. Different devices and structures were fabricated and tested by means of photodetection in order to clearly identify the origin of the detected photovoltages. Further investigations on rectenna configurations and nonlinear optical rectification process showed promising …
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Analysis of materials properties of thin film structures for thermoelectric and thermophotovoltaic applications
Metal-organic chemical vapor deposition (MOCVD) was used to grow InAsP graded layers and AlAs/GaAs superlattices for materials studies related to thermophotovoltaics and thermoelectrics respectively. High resolution x-ray diffraction (HRXRD) was used to determine the As concentration in each of the …
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Additive Fabrication of Microstructures Using Self-Assembled Organic Thin-Film Templates
… devices based on printed organic thin films of self-assembled monolayers. With further development, the patterning of metal and ceramic thin films directed by SAMs appears to have a great potential in fabricating the three-dimensional thin film structures needed for advanced device …
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Efficient light emitting devices utilizing CdSe(ZnS) quantum dots in organic host matrices
… efficient electroluminescence from thin film structures containing core-shell CdSe(ZnS) quantum dots dispersed in molecular organic host materials. In the most efficient devices, excitons are created on the quantum dot sites via energy transfer from organic host molecules, and direct …
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Ultra-sensitive Mid-infrared Detection Using Phononic Crystal Resonator-based Oscillator
… higher thermal conductance than suspended thin-film structures, enabling fast thermal response. Overall, this work demonstrates a room-temperature MIR detection approach that combines high sensitivity with rapid thermal response through SAW PnC engineering, offering a pathway toward broadly …
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An X-ray study of the behavior of titanium films on silicon substrates
The thin film reaction between silicon and titanium did differ from the ordinary diffusion process in bulk samples at elevated temperatures. The lower free energy monosilicide formed prior to the disilicide in bulk standards and was also the dominant reaction product at lower temperatures in films. …
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Microstructure evolution and interconnect realiability
… failure, normal grain growth in thin films was studied, analytic models were built for the grain structure statistics in 2D and 3D interconnects, and simulation programs were developed for generation of process and complex-geometry-sensitive interconnect structures. The models were …
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Electronic Coupling Effects and Charge Transfer between Organic Molecules and Metal Surfaces
… relations of thin epitaxial organic films. Clear correlations between the spectra and the differently intense coupling to the respective substrates are found. While rather broad and almost structureless spectra are obtained for a quaterrylene (QT) monolayer on Au(111), the spectral …
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Lifetime and efficiency improvement of organic luminescent solar concentrators for photovoltaic applications
… aspects, namely (i) the integration of thin-film technology for solar radiation transmission control and (ii) light guiding structures for solar radiation routing towards the edges of the glass window. Recently, photovoltaic (PV) solar cells have been investigated and promoted as products for …
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Directed self-assembly of block copolymers with functional materials : a study of nanocomposite thin film fabrication on graphoepitaxial templates
… technologies to fabricate functional nanostructures and is able to produce patterns with ultra-small resolution (sub-10 nm) while maintaining high throughput and order. However, existing DSA methods depend mostly on carbon or silicon-based BCPs, thus lack functionality for sophisticated …
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Voltage control of electrical, optical and magnetic properties of materials by solid state ionic transport and electrochemical reactions
… transport and electrochemical reactions in thin film structures, where the properties of materials can be electrically controlled by a gate voltage in an addressable way. Here we explore using such ionic gating method to control the electrical, optical and magnetic properties of solid-state thin …
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Magnetic properties of small multi-layered rings
Thin film rings can be an alternative geometry of magnetic memory cells, in which data bits are stored by the chirality of the flux-closed or 'vortex' state of the ring. The absence of the stray field in the vortex state is advantageous of high density data storage. Elliptical rings with 3 / 2 pm …
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Characterization and device applications of II-VI nanocomposites
… of a white-light LED. Embedding the QDs into ZnS films via an electrospray technique is carried out and the resulting films characterized with x-ray diffraction and photoluminesence measurements. QD film / ZnS film structures are also considered, with atomic layer deposition used as the method for …
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High performance magneto-optic garnet materials for integrated optics and photonics
… iron garnet and garnet-oxide nanocomposite films of generic composition type (Bi, Dy/Lu)3(Fe, Ga/Al)5O12 are prepared by using a radio frequency (RF) magnetron sputtering technique. The physical properties (crystallinity, film morphology, optical absorption spectra across the visible …
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Enhanced Structure and Crystallinity of Semiconducting Polymer Films Through Electrospray Deposition
… a higher degree of crystallinity as well as the film structure in the case of organic solar cells. The effects of different electrospray process parameters are investigated and various P3HT film structures are presented in this study. Electric repulsion present within the droplets in electrospray …
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Affective cinema : between style, chance and the moving body
… Cinema is a practice research project in film, informed by art cinema and experimental film traditions, and by conceptual fields derived from film theory and philosophy (specifically film ontology, and the philosophy of Deleuze, Bergson and Barthes). The primary outcome of the research is …
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Defect engineering of polycrystalline titanium dioxide synthesized by atomic layer deposition
… are lacking. The present work employs ALD as a film synthesis technique to allow precise control over TiO2 microstructure, crystallinity, and composition. It outlines the application of a sound metrological method for the evaluation of charge carrier concentration to metal oxide semiconductors …
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Coherent control of polarized neutron interferometry
… devices use remnant magnetization FeCoV thin films and can be tuned to achieve arbitrary rotation of an incident neutron with known magnetization. Polarized neutron reflectometry measurements are reported for FeCoV monolayer films at thicknesses of 0.5 [mu]m and 5.3 [mu]m to characterize the …
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Metal Oxide Nanoparticles: Optical Properties and Interaction with Chemical Warfare Agent Simulants
… concentration were also studied. Nanoparticle film structure was investigated with scanning electron microscopy. Two different film structures composed of oxide nanoparticles were found to grow under different synthesis conditions. The film structure was found to be determined by the degree of …
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