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 17 of 17 for “"Au surface"”.
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Gold nanoshells for surface enhanced Raman spectroscopy and drug delivery
… silica cores wrapped with thin layer of Au. Based on the size of the Au layer with respect to the silica core, gold nanoshells can resonantly absorb or scatter light at any wavelength on the visible or infrared. On resonance, gold nanoshells interact strongly with light to give rise to …
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Carbon nanotube surfaces for low force contact application
… electrical characteristics of CNT-based contact surfaces. In particular the use of gold thin films deposited on a CNT forest has potential to offer a very effective contact surface. Two different pieces of experimental apparatus were used in this research to determine the mechanical and …
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Application of impedance spectroscopy to the study of dithiocarbamate species on Au surfaces: Effects of aqueous Cu²⁺ and Mg²⁺ ions
… of dithiocarbamate ligands were formed on the Au surface of an interdigitated electrode (IDE) array by reaction of amines with CS<sub>2</sub> in H<sub>2</sub>O/CH<sub>3</sub>OH solutions. Impedance spectroscopy was used to probe for the presence of each SAM as they were individually applied to …
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Tailoring plasmonic substrates for SERS
… effect of adsorbing an organic monolayer on the surface of an SSV substrate was studied, which results in a slight shift in the plasmonic absorption. This was compared with the reduction of a diazonium salt on the surface, which results in a significant increase in plasmonic absorption, …
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Potencialo poveikio vandeninio tirpalo sluoksnio prie polimerinio paviršiaus savybėms tyrimas kvarco rezonatoriaus admitanso metodu /
… of Aqueous Solution Layer at Polymeric Surface By utilizing the methods of electrochemical impedance spectroscopy and quartz crystal microbalance (QCM) it was determined that the minima of density viscosity products of interfacial solutions having different adsorptive capability anions …
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Angle-resolved photoemission studies of two-dimensional electron systems
… the Ag-Ge interface potential. The complex Fermi surface, as a result of this interface scattering, can affect the electronic transport properties. An even stronger modification of quantum well states can be observed when the metal films are grown on stepped substrates. More specifically, our …
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Preparing Biological surfaces with well defined density and spatial distribution
The objective of this project is to fabricate a surface that is optimally spaced and well-defined, with respect to the molecular components to enable efficient binding from the surface. This binding will be done using supramolecular interactions and the steric bulk of dendrons (to achieve the …
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Evaluating Thermal and Mechanical Properties of Electrically Conductive Adhesives for Electronic Applications
… board (PCB) substrates with metallizations of Au/Ni/Cu and Cu, manufactured by Triad Circuit Inc. Effects of environmental aging on the durability of conductive adhesives and their joints were evaluated. All the samples for both mechanical tests and thermal tests were aged at 85%, 100%RH for …
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Interfacial processes in Li-ion batteries
… forms on both cathode and anode electrode surfaces. The composition and stability of the SEI to a large degree controls performance of the battery. This thesis investigates interfacial processes in Li ion battery electrodes as they relate to SEI, surface coverage, and structural properties. …
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Chemically Specific Protein Immobilization Strategies on Analytical Surfaces
… specific protein immobilization strategies on surfaces were explored. The goal of this work is to capture and bind proteins to the surface without losing their physiological properties. This approach permits to express functions of proteins after immobilization process. Using nitrilotriacetic …
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Structural, Electronic and Switching Properties of Metalloporphyrin Molecules on Metal Surfaces
… three different metalloporphyrins on noble metal surfaces. We studied the adsorption and self-assembly behavior of manganese- tetra-pyridine-porphy-rin (Mn-TPyP) molecules on a Cu(111) surface. The Mn- TPyP molecules align along the <110> directions and arrange into linear chains. Depending on the …
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Strukturuntersuchung organischer Moleküle auf Au(111)-Oberflächen
… the coadsorption of formic acid and water on Au(111) and the structure of biphenylalkanthiole SAMs on Au(111) surfaces. The coadsorption of formic acid and water on Au(111) surfaces has been investigated by means of vibrational and photoelectron spectroscopy (HREELS, XPS). Formic acid adsorbs …
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MoS2 on Gold: achieving extremely high exfoliation yield and optical contrast for Van der Waals monolayers
… materials. Molybdenum disulphide (MoS2) on gold (Au) is investigated in detail as it provides an extremely large exfoliation yield and a high optical contrast. These techniques are further explored with other VdWs and substrate materials. Further experimental work in electrically excited plasmonic …
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Development of an EQCM-based sensor for metal ions
… nuclear industry, the sensor consists of a gold (Au) piezoelectrode modified by a Nafion® polymer layer impregnated with a cationic hydroxainic acid (HA), a ligand showing oxidation state specific selectivity towards actinide 4+ ions and a non-radioactive demonstrator ion, Fe3+ In its final …
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Auxiliary proton-influenced metal-mediated reactions: dioxygen activation, anion coordination, and catalysis
… group revealed that it exists as the pyridone tautomer with a bifurcated hydrogen-bond. Coupling of these tridendate ligands gives the corresponding hydroxy- and methoxy-functionalized bis(tripodal) ligands. Cu[bis(2-methylpyrid-6-yl)(2-hydroxypyrid-6-yl)methane](NCMe)+ oxidizes readily in air …
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Deciphering the role of surface composition and topography in self-organized ion-induced nanopatterning of multicomponent semiconductors with in-situ and in-operando metrology
… reported ion-induced nanopatterning of the Au-Si system. The development of the in-operando compositional techniques has given new abilities to investigate the compositional evolution of material surface with high temporal resolution and has the ability to be used as a process control in a …
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Functional modification in ultrathin films: from metastable magnets to molecular materials
… Fe/Ni interface. The magnetic structure of the surface layer of 9-ML Fe on Ni on Cu(100) is closely related to the thickness of the underlying Ni film. A magnetic live layer with Curie temperature around 230 K is observed when the thickness of Ni layer is chosen to be 10 ML, while it is absent …