Departament de Ciència dels Materials i Química Física: Recent submissions
Now showing items 21-40 of 49
Desenvolupament de sistemes superhidrofòbics sobre substrats metàl·lics: estudi de l’estabilitat i la seva aplicació amb criteris de sostenibilitat
A la natura existeixen diferents animals o plantes com ara els sabaters (Gerris remigis), la flor de lotus (Nelumbo nucifera) o les fulles d’arròs (Oriza sativa) que presenten propietats extraordinàries com ara l’auto-neteja ...
Estudio de desechos industriales usados como materiales de almacenamiento de energía termoquímica
Los sistemas de almacenamiento de energía termoquímica presentan la ventaja de usar materiales que almacenan una alta densidad energética por un tiempo ilimitado, características importantes para ser aprovechadas para ...
Mechanical and functional properties in magnetic materials
This doctoral Thesis has been focused on the preparation of magnetic materials by different methods, the characterization of their structural characteristics, and the understanding of their mechanical and magnetic properties. ...
Study of solid particle materials as high temperature Thermal Energy Storage and Heat Transfer Fluid for Concentrating Solar Power
Renewable energies have a major role in today’s energy systems development, energy security and climate change fight. Thermal Concentrating Solar Power (CSP) has the potential to get up to 11.3% of world’s electricity ...
Transport and assembly of colloids in liquid crystals
Particles dispersed in nematic liquid crystals (NLCs), also called nematic colloids, are nowadays typical experimental systems studied in the field of Soft Matter. In this scenario, the interactions and forces between ...
Monte Carlo based methods applied to heterogeneous catalysis and gas separation
The research work presented in this thesis is divided in two main topics: gas separation and heterogeneous catalysis. Although the systems studied in one part and another are quite different, they share two fundamental ...
Rationalization of the Mechanism of Bistability in Dithiazolyl-based Molecular Magnets
In this work, we characterized and studied the properties associated to DTA-based bistable organic molecular magnetic systems, namely PDTA and TDPDTA, respectively. In both cases, the low and high temperature phases have ...
Hidrofobicitat en metalls modificats superficialment
La modificació de les superfícies dels materials permet obtenir propietats diferents a les que presenta el substrat prèviament o preservar-lo del medi que l’envolta. Les tècniques emprades amb aquest objectiu són molt ...
Modelling Nano-Oxide Materials with Technological and Environmental Relevance: Silica, Titania and Titanosilicates
Properties of nanomaterials are known to be size dependent and generally are very different from those of the corresponding bulk. Such behaviour, which is strongly system and structure dependent, allows one to tune material’s ...
Quantum Confinement of Gaseous Molecules in Nanostructures: Effects on the Dynamics and Internal Structure
Quantum confinement effects, understood as the changes on the structure and dynamics of a molecule when it goes from a free environment to a cavity with some characteristic length of the order of the nanometer, represent ...
Heterogeneous catalysis of green chemistry reactions on molybdenum carbide based catalysts
Our society has a problem with the use of fossil fuels, due to the vast and exceeding emissions derived from human activities. Two ways could be consider to mitigate these harmful effects. On the one hand, the capture, ...
Structural organization of model membranes: a complementary approach combining atomic force microscopy and X-ray techniques
Biological membranes (BMs) are self-sealing boundaries, which confine the permeability barriers of cells and organelles and provide the means to compartmentalize functions. Apart from being crucial for the cell structure, ...
Rational chemical design of Triarylmethyl-based devices and 2D materials
In this PhD thesis I have studied through state-of-the-art quantum simulations (mainly within the density functional theory approach, DFT) triarylmethyl (TAM) based systems with potential for future nano-devices and designed ...
Detección y caracterización de péptidos, proteínas y glicoproteínas como biomarcadores en fluidos biológicos. Aplicación al diagnóstico y seguimiento de diversas patologías
Esta tesis doctoral se ha centrado en el desarrollo de metodologías analíticas adecuadas que permitan la separación, detección, caracterización e identificación de proteínas y metabolitos como biomarcadores de diferentes ...
Microstructural characterization and mechanical properties of 9%Ni steel welds by submerged arc welding process using nickel-base alloys
Natural Gas with more than 80% methane has a liquefaction temperature around -165 ° C. Temperature at which the gas reduces its volume by a factor of 600/1. This operating temperature makes the use of ferritic materials ...
Electrochemical tunneling microscopy and spectroscopy of electron transfer proteins
Electron Transfer (ET) plays essential roles in crucial biological processes such as cell respiration and photosynthesis. It takes place between redox proteins and in protein complexes that display an outstanding efficiency ...
Desenvolupament de models per nanopartícules de TiO2 i ZnO en fotocatàlisis
En aquesta tesi s’han realitzat càlculs DFT per tal d’estudiar els sistemes TiO2 i ZnO i poder analitzar-ne les característiques de l’estructura electrònica, geometria i estabilitat energètica principalment. Primerament ...
Degradación de contaminantes de aguas residuales de la producción de aceite de oliva mediante procesos electroquímicos de oxidación avanzada
La degradación individual de los ácidos trans-cinámico, trans-ferúlico y 4-hidroxifenilacético se llevó a cabo utilizando varios EAOPs. Se trataron disoluciones de 100 ml de cada ácido en Na2SO4 0,050 M a pH 3,0 y temperatura ...
Density functional modelling of materials for fuel cell catalysts with reduced content of critical components
The thesis entiteled “Density Functional Modelling of Materials for Fuel Cell Catalysts with Reduced Content of Critical Components” deals with the following studies: • Adsorption sites at the {100} nanofacets of ceria ...
Electrocatalyst development for PEM water electrolysis and DMFC: towards the methanol economy
In this thesis, the hydrogen obtained in a PEM water electrolizer (PEMWE) as a reactant to produce methanol when combined with the CO2 captured from the combustion of fossil fuels is proposed. Methanol is easy to manage ...
