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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 “"Single crystal growth"”.
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Patterning Tri-Halide Perovskite Single Crystal Growth
… and lately field-effect transistors with single-crystalline perovskites have received more attention, because they should have ideal field-effect mobility and new crystal growth techniques have made them easier to synthesize. This research works to improve the reproducibility of the …
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Single crystal growth and characterization of BSO (Bi12SiO20)
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1994.
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Single crystal growth and characterization of silicon germanium alloys
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1999.
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Single-crystal growth of organic semiconductors and organic electronic applications
This thesis describes single crystal growth of organic semiconductors and their applications in organic electronics. In Chapter 2, a self-assembled monolayer of C60 derivatives with five carboxylic acids was employed to make C60 thin-film transistors. The highly-crystalline C60 monolayer enabled …
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Phase relations, single crystal growth, and characterization of metallic antiferromagnets
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01
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One-Dimensional Quantum Magnets in Cuprates: Single Crystal Growth and Magnetic Heat Transport Studies
… the compounds through doping. For this purpose single crystalline samples were produced using the Traveling Solvent Floating Zone technique, a crucible-free technology, which allows the growth of centimeter sized single crystals of high quality. In particular, the successful growth of large …
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Melt motion in floating-zone process for single crystal growth with an axial magnetic field
… axial magnetic field, for a dislocation-free single crystal, is studied by using asymptotic expansion. Centrifugal force, crystal growth speed, buoyancy, thermocapillarity and electromagnetic body force are the driving forces involved in the floating-zone process for growing single crystal. …
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Magnetic-field- and pressure-tuned phases in LaxPryCa1−x−yMnO3 and Mn3O4: inelastic light scattering studies and single crystal growth
… on the magnetodielectric material Mn3O4, the single crystal sample measured was grown using a floating zone technique. High quality single crystals play a key role in the detailed studies on the mechanisms responsible for the complex phases and intriguing phenomena—which, particularly, show …
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Synthesis and characterization of single crystal kagomé lattice antiferromagnets
… of this frustrated magnetic system. However, single crystals are crucial for further progress. We have successfully produced high quality single crystals ZnCu3(OH)6Cl2 . These crystals are large enough for measurements, such as x-ray diffraction, magnetism, heat capacity, neutron scattering, …
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Compositional tuning, crystal growth, and magnetic properties of iron phosphate oxide
Iron phosphate oxide, Fe3PO4O3, is a crystalline solid featuring magnetic Fe3+ ions on a complex lattice composed of closely-spaced triangles. Previous work from our research group on this compound has proposed a helical magnetic structure below T = 163 K attributed to J1-J2 competing interactions …
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Crystal Growth, Atomic Ordering, Phase Transitions in Pseudobinary Constituents of the Metastable Quaternary (gallium-Antimony)(1-X)(germanium(2)(1-Y)tin(2y))(x) (Semiconductor, Sputtering, Ion Bombardment, X-Ray Diffraction, Electron Microscopy)
Thin film single crystal growth of metastable semiconducting (GaSb)(,1-x)(Ge(,2))(,x), Ge(,1-x)Sn(,x), and (GaSb)(,(1-x))(Ge(,2(1-y))Sn(,2y))(,x) alloys is studied as a function of growth parameters. The effects of low-energy ion bombardment of growing films during vapor phase epitaxy are …
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X-ray diffraction study of the high-density phases of solid 4He
… of 4He to 60 atoms/nm3 • This includes in situ single crystal growth and characterization; measurement of the De bye-Waller factor through the dependence of the scattered intensities on the wave-vector transfer,q; study of the inelastic diffuse scattering to relate it to crystal elastic …
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Design, construction, and optimization of a magnetron sputtering system for urania deposition
… Information containing details pertinent to single crystal growth of urania and ceria including comparisons with other systems and their respective operating parameters is also provided. It was also the responsibility of the author to provide quantitative analysis on the behavior of the Gas …
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Syntheses and Photophysical Studies of Two-Dimensional Hybrid Organic-Inorganic Semiconductors
… In this thesis, we first present cooling-induced crystallization to produce phase-pure 2D LHPs with controllable chemical compositions. Using single-crystal X-ray diffraction, we refined their crystal structures across temperatures and observed two phase transitions corresponding to structural …
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Superconductivity and low temperature properties of niobium diselenide single crystals grown by direct vapor transport
A procedure for the growth of high purity single crystals of 2H-NbSe₂ by a direct vapor transport (DVT) method was developed. Single crystal growth rate and the degree of crystal perfection were studied as deviations from stoichiometry were made over the compositional range of Nb<sub>0.95</sub>Se₂ …
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Development of graphene growth surfaces for III-V semiconductors
… material as an interface layer between a III-V growth substrate and an epitaxial film. For example, 2D material such as graphene coated on GaAs substrates allows the registry information of the underlying substrate to permeate through the graphene and facilitate the formation of exact copy of …
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Novel ultra-violet/blue optoelectronic materials and devices based on copper halides (CuHa)
… novel research carried out towards achieving single crystal growth of γ-CuCl from solution via Liquid Phase Epitaxy (LPE) based techniques. LPE growth runs are undertaken using an alkali halide flux compound (KCl) to depress the liquidus temperature of CuCl below its solid phase …
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Crystal growth of functional oxides using an image furnace
The present study is concerned with the single crystal growth of functional oxides by the floating zone technique using a four mirror image furnace. This thesis attempts to extend our knowledge of the subject by firstly studying the optical floating zone method as a technique in terms of the …
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Single-crystal germanium growth on amorphous silicon
… limited in thermal budget and does not present a single-crystal substrate for epitaxial growth, however, so high-quality crystal fabrication methods currently used for photonic device fabrication are not possible in back-end processing. This thesis presents a method for the fabrication of …
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The 5-th element. A new high pressure high temperature allotrope
… diffraction data and further refined using single-crystal synchrotron diffraction data. The structure was found to be orthorhombic with a Pnnm space group and composed of B12 icosahedra and B2 dumbbells. The unit cell contains 28 atoms (two icosahedra and two dumbbells) and will be called …
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