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 83 for “"Surface Science"”.
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SURFACE SCIENCE APPROACH TO ATOMIC LAYER DEPOSITION CHEMISTRY
… and microelectronic devices. In this work, surface sensitive characterization techniques have been employed to investigate initial precursor-substrate reactions and ALD surface chemistry.
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Selected Topics on Molecular Electronics, Magnetism and Surface Science
This thesis is a theoretical work on the solid state using computational physics. The basic tool underlying most of the calculations is Density Functional Theory, which describes the system in terms of the electronic density and maps the interacting system onto an equivalent non-interacting set of …
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Challenging Theories in Surface Science: Models of Active Sites and Carbon Monoxide Surface Binding
… trifluoroacetone, and carbon that remains on the surface. An unidentified compound desorbs from the surface as well. The decomposition of hexafluoropentanedione on O/Pt(110) means that it will not be a good etchant for platinum.
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Complementary computational chemistry and surface science experiments of reaction pathways in aluminum chemical vapor deposition
… molecular properties for both gas phase and surface reactions. Along with pioneering efforts in applying these tools to semiconductor processes come issues such as understanding accuracy, how to approach a given problem, and defining problems into practical sizes. To this end, a combined …
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Getting to the Point: Bridging the Gap between Simple and Complex Catalytic Systems using Temporal Analysis of Products (TAP)
… kinetics, researchers often study simpler surfaces such as single crystals using surface science techniques. This introduces a well-known problem in the field of catalysis commonly referred to as the "pressure and materials gap." Typically, industrial catalyst research is performed under …
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Photoemission and photoelectron diffraction studies of semiconductor surfaces
Several experimental surface science techniques, such as photoelectron diffraction (PED), photoemission extended fine structure (PEFS), and photoelectron holography (PEH), rely upon the measurement of the interference due to the photoelectron wave scattering from nearby atoms. The intensity …
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Structural Characterization of Thin Films of Molecules on Solid Surfaces: Development of a Portable UHV Chamber to Bridge RHEED and SFG Spectroscopy Techniques
In surface science, it is often essential to visualize and obtain the structures of molecules at solid-liquid and solid-vacuum interfaces, etc. Each surface characterization method has its advantages and disadvantages, and there is no single technique that can provide all possible information about …
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Scanning tunneling microscopy of silicon(100) 2 x 1
The Si(100) 2 x 1 surface, a technologically important surface in microelectronics and silicon molecular beam epitaxy (MBE), has been studied with the scanning tunneling microscope (STM) to attempt to clear up the controversy that surrounds previous studies of this surface. To this end, an …
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In Situ Studies of Promoted Catalytic Surfaces and Redox Active Mineral Surfaces
… to probe reaction chemistry on two sets of surfaces; the first, a silicon-copper alloy surface where copper acts as a catalyst in the synthesis of methylchlorosilanes, and the second, a redox active iron-sulfur surface. Spectroscopic information obtained in situ will be combined with kinetic …
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Substrate dependance, temperature dependance and temperature sensitivity and resolution of doped-silicon microcantilevers
… for use in data storage, sensing, surface science, and nano-manufacturing. The rst objective seeks to understand the speci c thermal interactions between a heated microcantilever tip and various substrates. The experiments investigate thermal conductance, thermal time constant, and …
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Dynamic in-Plane Potential Gradients for Actively Controlling Electrochemical Reactions: Part I. Characterization of 1- and 2-Component Alkanethiol Monolayer Gradients on Thin Gold Films. Part II. Applications of in-Plane Potential Gradients
… monolayer gradients is investigated. Numerous surface science tools are employed to examine the distribution in coverage obtained by application of in-plane potential gradients. Macroscopic characterization was obtained by sessile water drop contact angle measurements and surface plasmon …
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Interfacial Energy Transfer in Small Hydrocarbon Collisions with Organic Surfaces and the Decomposition of Chemical Warfare Agent Simulants within Metal-Organic Frameworks
A molecular-level understanding of gas-surface energy exchange and reaction mechanisms will aid in the prediction of the environmental fate of pollutants and enable advances toward catalysts for the decomposition of toxic compounds. To this end, molecular beam scattering experiments performed in an …
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A Theoretical and Experimental Investigation of the Physical and Chemical Properties of Solid Nanoscale Interfaces
… in nanoscale materials, the fascinating field of surface science is rapidly growing and presenting challenges to the design of both experimental and theoretical studies. The primary aim of this dissertation is to shed some light on the physical and chemical properties of selected nanoscale …
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Joint Density-Functional Theory For Energetics And Spectroscopy In Complex Aqueous And Nonaqueous Solvents
… energy materials discovery, catalysis and surface science. In this dissertation, we develop accurate and fast joint density functional theories for complex, non-aqueous solvent enviroments, including organic solvents and room temperature ionic liquids, as well as new methods for calculating …
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SPECTROSCOPIC STUDY OF ICES WITH ASTROPHYSICAL INTEREST
… of simulated cosmic dust grainsand planetary surface analogues in laboratory experiments performed at the Syracuse University Astrophysics and Surface Science Laboratory. I have studied the mid-infrared (Mid-IR) bands of thin films of pure CH4 ices and of CH4 ices mixed with N2 and H2O in …
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Fundamental Studies of Reactions between NO3 Radicals and Organic Surfaces
Ultrahigh vacuum (UHV) surface science experiments were designed to study reaction kinetics and mechanisms of gas-phase NO₃ radicals with well-organized, highly characterized, organic thin films. The surface reactions were monitored in situ with reflection-absorption infrared spectroscopy (RAIRS). …
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How visual representations affect undergraduate students’ use and understanding of engineering concepts during problem solving
In this two-part thesis, I address gaps in the surface science of semiconductor materials for photovoltaics and discipline-based education research literature. Surface Science of Semiconductor Materials for Photovoltaics With the rise of global energy consumption, it is important to find low-cost, …
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Ultrathin films on semiconductor substrates : growth, magneto-optical characteristics and spin injection
… strategy and capabilitiesof this system in surface science studies are described in details in this thesis, as wellas the sample preparation and surface characterisation techniques.The magneto-optical effects were introduced, together with the representations of thepolarisation states …
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Interaction of Na, O₂, CO₂ and water on MnO(100): Modeling a complex mixed oxide system for thermochemical water splitting
… steps on a well-defined MnO(100) single crystal surface, utilizing x-ray photoelectron spectroscopy (XPS), low energy electron diffraction (LEED) and temperature programmed desorption (TPD). While some of the behavior of the catalytic system is observed with the model system developed in this …
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Indium growth and island height control on Si submonolayer phases
… nanostructures. An important goal in present day surface science is to grow uniform sized self-assembled nanostructures. One system which has displayed a number of interesting surface structures is Pb/In grown on a Si(111) substrate. The first part of the thesis discussed Pb islands grown on the …
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