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 “"substrate effects"”.
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Catalyst and substrate effects in enantioselective C–H insertion reactions of α-diazosulfones
… steric and / or electronic factors on both the substrate and the catalyst which control regio-, diastereo- and enantioselectivity patterns in these synthetically powerful transformations. Full experimental details for the synthesis and spectral characterisation of the compounds are included at …
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On-chip self-rolled-up nanomembrane tube inductor for RFIC performance enhancement
… structure, especially the most critical issue – substrate effects. A new design concept based on self-rolled-up nanomembrane nanotechnology that “processes like 2D and functions like 3D” is proposed and demonstrated. This thesis shows a global solution to obtain a lumped inductor with extremely …
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Thin film Palladium-Ytrium membranes for hydrogen separation
… deposited onto macroporous 316L stainless steel substrates by magnetron sputtering. Prior to deposition, a novel laser melting technique was employed in an attempt to reduce the surface roughness and pore size, thus facilitating the deposition of defect-free films. The active hydrogen transport …
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Full-wave analysis of large conductor systems over substrate
… which are caused by the presence of a conductive substrate. The severity of these problems increases as integrated circuit clock frequencies rise into the multiple gigahertz range. In this thesis, a simulation tool is presented for the extraction of full-wave interconnect impedances in the …
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Bacterial adhesion and detachment from model mineralized biofilms
… of crystals, which could not be attributed to substrate effects alone. The deviation between replicates is attributed mostly to small changes in water content, resulting in significant changes in the elastic modulus. Elastic moduli of biofilms were found to be even lower (averaging 0.16 kPa), …
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EXPLORATIONS IN MEDIUM-RING ETHER SYNTHESIS VIA UMPOLUNG HETEROATOM ACTIVATION: TOTAL SYNTHESIS, METHODS DEVELOPMENT, AND REAGENT SYNTHESIS
… expanded scope, and a better understanding of substrate effects on reactivity. Finally, armed with improved access to medium-sized cyclic ethers, the 11-step total syntheses of Heliannuols D and A was accomplished in the most concise and highest yielding asymmetric syntheses to date. The …
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Effects of Thickness and Indenter Tip Geometry in Nanoindentation of Nickel Films
… behavior, mechanical properties of thin films on substrates and bulk materials, and the effect of geometrically different indenters (Berkovich, cubecorner, and conical). X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscopy (SEM), and atomic force microscopy …
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Surface friction and bulk properties of cortical gray and white matter in LE/Blu Gill rats
… samples and measurements can be affected by substrate effects. Indentation to increasing depths is used to evaluate the stiffness of gray matter as well as any permanent deformation. The reciprocating sliding experiments are performed in three locations: over gray matter, parallel to a region …
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Nanoscale studies of CVD graphene and poly(3-hexylthiophene) thin films.
… in understanding and characterizing different substrate effects on graphene film growth, particularly useful for defect analysis and quality control. This thesis also presents analyses of the important role of pre-treatment of the Cu catalyst on the improvement in quality and continuity of …
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Structural Analysis of the TOL pDK1 xylGFJQK Region and Partial Characterization of the xylF and xylG Gene Products
… purified and characterized with respect to substrate specificity and kinetic mechanism. Evidence was obtained suggesting that the HMSD reaction occurs via a steady state ordered mechanism or a random mechanism where binding of the first substrate effects the enzyme's affinity for the second …
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Geometrical and electronic structure of metal oxide nanoparticles on silica and alumina
… nanoparticles cause demonstrable health effects. It is essential to understand the chemical characteristics of these nanoparticles. Since combustion-generated nanoparticles arise in complex mixtures, we employed a dendrimeric method to generate simpler, more reproducible nanoparticles, …
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The Interaction Between the Substrate and Frost Layer Through Condensate Distribution
… observations of frost deposition on a variety of substrates having different contact angles, allow the quantification of substrate effects on frost structure during inception and growth. The deposition of vapor at the beginning of the frosting process on a clean glass substrate is found to be as …
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TWO-DIMENSIONAL CRYSTALS ON SUBSTRATES: MORPHOLOGY AND CHEMICAL REACTIVITY
… external perturbations imposed by supporting substrates. First, the mechanical response of graphene supported on corrugated substrates is studied. I find that the structural evolution of graphene depends on the roughness of the substrate and the graphene thickness. On SiO<sub>2</sub> …
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Mapping plasmon excitations in gold nanostructures using electron energy loss spectroscopy
… calculations and some initial results regarding substrate effects and size-dependent plasmonics are presented. The experimental procedure is given in this chapter where we describe the fabrication and examination of our Au nanosturctures. In this work we use electron beam lithography as a method …
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Chemistry of hydroxycinnamate esters and their role as precursors to Dekkera produced off-flavour in wine.
… photoisomerisation. Smaller solvent and substrate effects were also noted, though the nature of the phenol and carboxyl clearly played the most important role in determining stability of each isomer. Fermentation in the presence of the synthesised trans-hydroxycinnamoyl esters (7-12) and …
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Sediment-effects on seagrass Zostera muelleri in New Zealand
… The goal of this PhD was to determine sediment effects on the seagrass Zostera muelleri in terms of light attenuation and substrate physico-chemical alteration. Within this research framework, provision of assistance for successful seagrass restoration was also considered. The principal research …