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 505 for “"epitaxial"”.
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DESIGN, FABRICATION AND CHARACTERIZATION OF EPITAXIAL AND NON-EPITAXIAL THERMO-PHOTOVOLTAIC CELLS
… heat sources. The quaternary alloys are grown epitaxially while the binary GaSb devices can be realized through non-epitaxial techniques. In this work, we have pursued fabrication and design methods that will allow us to realize large area GaSb-based diode technology for TPV applications. TPV …
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Magnetic studies of epitaxial neodymium
… properties. Early studies of Nd prepared epitaxially as thin films with either nonmagnetic yttrium (Y) or magnetic praseodymium (Pr) demonstrated magnetic properties hitherto unforeseen. To probe the newly discovered phenomenon, thin films of Nd and NdY alloys have been prepared in one of …
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Epitaxial silicon growth rate control
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Epitaxial nanolayers of large organic molecules
In der vorliegenden Arbeit wurde das hochgeordnete Wachstum von großen organischen Molekülen auf kristallinen Substraten mit Hilfe der Quaterrylenderivate QT, QTCDI und QTCMI untersucht. Um derartige Schichten herstellen und charakterisieren zu können, wurde eine Organische Molekularstrahlepitaxy …
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Resistance in Superconducting Epitaxial Niobium Nanowires
… observed DC resistance at low temperature. The epitaxial films in this study are between 10 and 30 mn thick. While the finished wires range in length from 1 to 10 mum; and in width from 35 to 400 nm. Transport measurements on the nanowires of varying widths show a range of distinct temperature …
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Epitaxial SiGe synapses for neuromorphic arrays
… arrays. In contrast to amorphous films, epitaxially-grown SiGe can confine metal filaments within widened threading dislocations for uniform conductance update thresholds. Metal confinement reduces temporal variation to as low as 1%, which is the lowest variation reported to date, to the …
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Growth and magnetotransport studies of epitaxial graphene
In this thesis single-crystal 4H silicon carbide is decomposed by annealing in ultra-high vacuum conditions, forming a surface layer consisting of a few atomic layers of graphitic carbon (graphene) arranged in known crystallographic register with the substrate material. The layers of graphene on …
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Metrology of very thin silicon epitaxial films
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Metrology of very thin silicon epitaxial films
… thickness measurement of sub-0.5 µm silicon epitaxial films has been successfully performed using spectroscopic ellipsometry (SE) in the visible to near infrared (NIR) range (0.73 - 3.3 eV). The undoped epitaxial .films are grown on heavily doped substrates by chemical vapor deposition at 700 …
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Two phase magnetoelectric epitaxial composite thin films
… films, the phase stability was controlled by epitaxial engineering. Because ferroelectric properties are strongly related to their crystal structure, it is necessary to study the crystal structures in single phase ferroelectric thin films. Through constraint of the substrates, the phase …
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Growth and characterization of epitaxial gallium oxide films
… be concluded by the following: (i) For the homoepitaxial growth by MOVPE on (100) β-Ga2O3 films up to µm-thickness-level, a certain VI/III (O2/Ga) ratio is crucial to maintaining the desired step-flow morphology as well as good electrical properties. This observation can be explained by the …
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The Edge States of Epitaxial Graphene on SiC
… ballistic transport was observed in sidewall epitaxial graphene nanoribbons on SiC (SWGNRs) at room temperature. These objects are of fundamental interest as they provide a direct access to charge neutral graphene with excellent transport properties. In this thesis, beyond sidewalls, we …
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Lattice gas models and simulations of epitaxial growth
… develop models for the numerical simulation of epitaxial crystal growth, as realized, e.g., in molecular beam epitaxy (MBE). The basic idea is to use a discrete lattice gas representation of the crystal structure, and to apply kinetic Monte Carlo (KMC) simulations for the description of the …
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CAFM Studies of Epitaxial Lateral Overgrowth GaN Films
… behavior for samples in this study included: epitaxial lateral overgrowth (ELO) and nano-ELO using a Si3N4 film. Both techniques decrease defects such as threading dislocations by controlling the nucleation and growth behavior of the GaN films. The EL0 technique uses a patterned dielectric …
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Magnetoelectric Properties of Epitaxial Spinel Oxide Thin Films
… functional characterization of high-quality FVO epitaxial thin films on perovskite SrTiO3 substrates. The magnetic and electrical properties of FVO films are presented as well as the characterization of magnetoelectric coupling of the material. Secondly, another unique spinel, Cobalt Chromite, …
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Growth and characterization of epitaxial silver indium diselenide
… These are best inferred through study of epitaxial films, yet they have little mention in literature and have not been the subject of a detailed study. This work describes the growth of epitaxial AgInSe2 (AIS) on GaAs substrates, studying the morphology, structure, and surface properties …
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