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 10 of 10 for “"Chemical Vapor Transport"”.
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Synthesis, Superstructure, Vacancy-Ordering of Intercalated Transition Metal Dichalcogenides
… compounds has been performed by the method of chemical vapor transport, using iodine as a transporting agent. X-ray diffraction may reveal superlattice reflections, which then indicates the existence of a superstructure. An eightfold superstructure has been found for 6R-CuxTa1+yS2 (x = 0.237, y …
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An Investigation into Topological Crystals and Flat Band Systems
… of solid state reactions, flux growths, and chemical vapor transport growths. For these systems, the predicted physics, as well as the design, execution, and characterization of quantum material synthesis will be presented.
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Exploring valleytronics in 2D transition metal dichalcogenides
… tungsten disulfide (WS₂) synthesized by chemical vapor transport (CVT). This novel method of bottom-up growth relies on halide-driven vapor transport commonly utilized in bulk crystal growth. Using a small amount of sodium chloride salt as a source of chlorine, non-volatile WS₂ can react …
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Synthesis of 1T-Tantalum (IV) Sulfide and observation of charge density wave using scanning tunneling microscopy
… of 1T-TaS2 through Iodine-assisted chemical vapor transport (CVT). After a few growth setup revisions, the growth processes have given consistently high yields. Next, we performed an ultra-high vacuum scanning tunneling microscopy (UHV-STM) study of the grown poly-crystalline …
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Investigation of structural changes in vanadium containing transition metal oxides
… up to x = 0.60, using a novel, two-step chemical vapor transport synthesis. Using these large single crystals for total scattering experiments, we report the discovery of the sudden collapse of three-dimensional order in the low-temperature phase of V1-xMoxO2 at x = 0.17 and the emergence …
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COMPOSITION AND PRESSURE DEPENDENT STUDY ON WEYL SEMIMETAL Mo1-xWxTe2
… (for parent compounds MoTe2 and WTe2) and the chemical vapor transport method (for doped compounds). The single crystals were then characterized by energy- dispersive X-ray spectroscopy and X-ray diffraction (XRD). Temperature-dependent resistivity measurements at ambient pressure show metallic …
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STM Study of Interfaces and Defects in 2D Materials
… materials show novel electronic, optical and chemical properties and have great potential in devices such as field-effect transistors (FET), photodetectors and gas sensors. This thesis focuses on scanning tunneling microscopy and spectroscopy (STM/STS) investigation of interfaces and defects …
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Study of growing incongruent antiferromagnetic single crystals and characterization
… Fe2As, FeSn, and Cr2Al were investigated. The chemical vapor transport (CVT) has been used to assemble large crystalline grains below their melting/decomposition temperatures. In this thesis, the thermodynamics of these CVT reactions are investigated and presented alongside experimental efforts …
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Compositional tuning, crystal growth, and magnetic properties of iron phosphate oxide
… and success has been achieved via heterogenous chemical vapor transport from FePO4 using ZrCl4 as a transport agent. These crystals are of sufficient size for single crystal measurements on modern neutron diffractometers. Dilution of the magnetic sublattice in frustrated magnets can also provide …
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Structure Characterization and Electronic Properties Investigation of Two-Dimensional Materials
… grown on mica were investigated through the chemical vapor transport (CVT) method, using scanning tunneling microscopy and spectroscopy (STM/STS) and first-principles calculations. Five types of distinct defects were observed from STM topography images and the local density of states of the …