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 9 of 9 for “"Cu/SiO2"”.
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A Study on Catalytic Sites Contiguity in Cu-ZnO-Based Catalysts for CO2 Hydrogenation to Methanol
… CO2 hydrogenation to methanol (MeOH) in various Cu–ZnO systems. Three phases are formulated as follows. Phase 1 studied the CSC of atomically-dispersed ZnO-Cu/SiO2 catalysts for improving MeOH formation. Using the atomic layer deposition (ALD), atomically dispersed ZnO (ADZn2+) sites were …
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Diffusion Barriers/Adhesion Promoters. Surface and Interfacial Studies of Copper and Copper-Aluminum Alloys
The focus of this research is to study the interaction between copper and the diffusion barrier/adhesion promoter. The behavior of copper sputter-deposited onto sputter-cleaned tantalum nitride is investigated. The data show that copper growth on tantalum nitride proceeds with the formation of 3-D …
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Prediction Of Optical Properties Of Plasmonic Composites: Applications To Solar Energy Harvesting
… nanoscale spherical metallic inclusion(s): Ag/Cu in Air/SiO2) with various diameters and compositions. Fair agreement was found between simulation and effective medium theories for binary and ternary composites. Responses of ternary Ag/Cu/SiO2 composites with various Ag:Cu ratios were found to …
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Sintesi e caratterizzazione di nanocompositi aerogel altamente porosi per applicazioni catalitiche
This thesis has focused on the synthesis, characterization and catalytic applications of nanocomposite aerogels, made out of an active nanophase dispersed in a highly porous amorphous silica matrix. These nanocomposites have unique properties which mainly depend on the composition, size and …
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Area selective atomic layer deposition of silicon dioxide on silicon dioxide using surface passivation of copper non-growth surface
… in growth during ALD, an inhibitor molecule is required to functionalize the non-growth surface prior to ALD process. This bottom-up surface selective variant of ALD is area selective ALD and can be widely used in structures during device processing. In this thesis work, we have …
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Study of thin metal films and oxide materials for nanoelectronics applications
… surface morphology of gold and copper films on SiO2/Si substrates is investigated as a function of annealing temperature. Annealing arranges the Au crystallites in the [111] direction and changes the morphology of the surface. Relaxation of the Au layer at high temperatures is responsible for …
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Valorización de etanol y acetona mediante procesos catalíticos
… Doctoral se estudia la valorización de dos moléculas plataforma: etanol y acetona. En ambos casos, la obtención de productos de valor añadido requiere el aumento de la longitud de la cadena carbonosa, generalmente mediante reacciones condensación catalítica. En el caso del etanol, se considera …
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GREEN CATALYTIC STRATEGIES FOR THE PRODUCTION OF BIOBASED BUILDING-BLOCKS
… system. Biomass-waste valorization, in particular ligno-cellulosic wastes, and the use of sustainable processes are pillars of the green chemistry approach. Notably, biobased lactones can be valorized into new valuable molecules such as diols and amines that are ubiquitous chemicals in …
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INTEGRATED AND MULTI-SCALE CHARACTERISATION OF GEM MATERIALS LACKING LONG-RANGE ORDER. THE CASE STUDIES OF CHRYSOCOLLA AND ANDEAN BLUE OPAL
The PhD research project was focused on the integrated and multi-scale characterisation of gem materials lacking long-range structural order. These materials, positioned between crystalline and completely amorphous systems, present significant challenges in terms of classification and …