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 16 of 16 for “"thin-film systems"”.
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Tribology and interfacial delamination of thin film systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
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Phase formation sequence at metal-germanium interfaces in thin film systems.
Germanium thin films are used in integrated circuit electronic devices. Interest in germanium is due to the high mobility of its electrons and holes. It can therefore be used among other things as a high speed complementary transistor as well as in other devices. It is also used for making Ohmic …
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Photoemission studies of surfaces and thin film systems of silver and gold
… properties of Au 4f7; 2 core level in several systems: Au overlayers on Ag(lll), Au overlayers on Ag(lOO), and an Au monolayer buried in Ag(lll). Properties of a zone-center surface state were also investigated with the use of angle resolved photoemission spectroscopy for many related systems: …
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Thickness and strain determinations of thin film systems by x-ray analysis
… and strains in sputtered polycrystalline thin films of molybdenum and titanium on silicon single crystal substrates. The thickness determination method used was an extension of a previous method wherein the orientation function determined from experimental data obtained in only a part of …
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Angle-resolved photoemission studies of quantum-electronic coherence in metallic thin-film systems
When the thickness of a film approaches the nanoscale, the confinement of electrons in the film by its surface and interface gives rise to distinct electronic states known as quantum-well states. Related to the electromagnetic standing waves in an optical Fabry-Perot interferometer, electrons in a …
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The design, synthesis and characterization of chitosan-based interpenetrating polymer networks and thin film systems
… onto a substrate of choice to dry and form a thin film structure. It could also be drop-cast onto pre-existing structures such as photonic crystals, in order to study the resulting optical properties or infused with particles such as gold and silver nanoparticles in order to form composites …
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Magnetic flux flow and fluctuation effects in thim film superconductors
Critical state measurements of single and binary thin film systems have been measured as a function of transport current density, magnetic field, temperature, and degree of annealing. Results are interpreted in terms of the present understanding of the mixed state in thin films. Studies of vorteK …
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Thermodynamic modeling and microcalorimetry of nanostructured materials for capacitive thermal management of electronics
… In this thesis I propose novel nanostructured thin-film materials that can potentially exhibit significantly enhanced volumetric enthalpy change. Using fundamental thermodynamics of phase transition, calculations regarding the enhancement resulting from superheating in such thin film systems is …
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Electrical noise studies of the re-entrant spinglass nickel-manganese
… suggests a different picture for at least thin film systems with partial short-range atomic order. In this picture it is clusters of spins rather than individual spins that have a random transverse component of magnetization. In addition to these results, electrical noise arising from the …
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Interfacial Magnetism and Exchange Bias in Metal Oxide Thin Films
… thesis focuses on the investigations of magnetic thin film structure of cubic and perovskite transition metal oxide magnets, particularly when two different magnetic orderings are competing at such interface. The goal is to understand the various effects of an interfaces that exert on the …
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Scanning tunneling microscopy and spectroscopy study of layered transition metal chalcogenide thin films tuned by thickness, structural phase, and heterostructure
… development. More often than not, the thin film samples behave differently from the corresponding bulk single crystals. For example, monolayer WTe2 is a quantum spin Hall insulator, a novel phase of quantum matter, while bulk WTe2 is a Weyl semimetal. Moreover, the electronic and …
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A phase-field study of ternary multiphase microstructures
… growth instability in multiphase thin-film systems was discovered, highlighting how ternary systems differ from binary systems, and intricate asymmetries in the processes of solidification and melting were simulated. A nucleation barrier for solidification was observed and prompted …
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Exploiting polar interfaces for photocatalytic water splitting: application to the anatase-cuprous oxide heterojunction
… mechanisms that take place for finite-sized systems. In the thermodynamic limit, such polar heterojunctions have diverging potential (polar catastrophe). However, for thin-film systems composed of only several atomic layers on either side of the heterointerface the intersection of this …
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Advanced Synthesis of Ultra-High Temperature Ceramics (UHTCs) and High Temperature Electron Emitting Materials
… the development of suitable materials and systems for the different components of a hypersonic vehicle, each of which must have the inherent capability to resist extreme temperatures, high thermal shock due to high heat flux, and high oxidation and ablation. First, the ultra-high …
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Characterisation of focused ion beam nanostructures by transmission electron microscopy
… and control of the properties of magnetic thin films. Basic magnetic properties such as coercivity and local anisotropy direction can be altered in NiFe (Permalloy) films, whilst for Co/Pd multilayers, ion irradiation results in a transition from perpendicular to in-plane magnetisation. …
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Pattern Formation and Phase Behavior in PS-B-SI Containing Block Copolymer Thin Film
… processing conditions. So far, block copolymer thin films have already achieved certain success, mainly with higher molecular weights and a feature size of ~30 nm. Several challenges still remain, such as (a) the generation of long-range ordered structure with smaller feature sizes (domain size …