Exploració per tema "Nanostructures"
Ara es mostren els items 21-40 de 75
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Enhancement of absorption and nonlinearities in nanostructures and metamaterials
(Universitat Politècnica de Catalunya, 2019-06-26)
Treball Final de Grau
Accés obertHumans have lived hand in hand with light since the beginning of time. The more the knowledge and technology advances, the more discoveries and applications involving electromagnetic waves are found and created. This thesis ... -
Estudi d’un nou mètode de consolidació ultra-ràpid de pols de metall nanocristal·lina
(Universitat Politècnica de Catalunya, 2012-09)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autorEn el següent treball fi de màster es presenta l’estudi d’un nou mètode de consolidació de la pols de Fe pur per obrir una nova via de treball amb l’objectiu final de millorar les propietats mecàniques del Fe. La pols de ... -
Estudio experimental para el diseño de pilar de electrolito orgánico empleando polímeros conductores como electrodos
(Universitat Politècnica de Catalunya, 2018-06-26)
Treball Final de Grau
Accés obertEl objetivo de este proyecto es preparar y caracterizar una batería orgánica multicapa de PEDOT y P(EDOT-co-NMePy) con interfase nanoporosa. Para ello se elaboran tres tipos de films distintos de cuatro capas, uno con ... -
Fabricación de membranas con inverse opal
(Universitat Politècnica de Catalunya, 2021-07-02)
Treball Final de Grau
Accés restringit per acord de confidencialitat -
Fabrication and characterization of graphene nanostructures
(Universitat Politècnica de Catalunya, 2012-09-06)
Projecte Final de Màster Oficial
Accés obert[ANGLÈS] We fabricate graphene nanostructures for experimental studies on graphene plasmonics and graphene-quantum dot interactions. We use a focused ion beam to mill structures in a substrate, and deposit graphene on top. ... -
Fabrication of cost-effective, highly reproducible large area arrays of nanotriangular pillars for surface enhanced Raman scattering substrates
(2016-10-14)
Article
Accés obertDevelopment of cost-effective, highly reproducible non-conventional fabrication techniques for anisotropic metal nanostructures is essential to realizing potential applications of plasmonic devices, photonic devices, and ... -
Fano-like resonances in nanostructured thin films for spatial filtering
(2021-03-29)
Article
Accés restringit per política de l'editorialFano-like resonant coupling of electromagnetic radiation with planar waveguiding modes of nanostructured thin films is proposed and realized experimentally. Different from conventional Fano coupling to compact resonators ... -
Growth of plasmonic gold nanostructures by electron beam induced deposition
(2007-09)
Article
Accés restringit per política de l'editorialThe authors report on the growth of organometallic dots for optical applications using electron beam induced gold deposition on a transparent substrate. The effects of the substrate material and the deposition parameters, ... -
Harmonic generation in the opaque region of GaAs: the role of the surface and magnetic nonlinearities
(2019-08-29)
Article
Accés obertPhase-locked second and third harmonic generation in the opaque region of a GaAs wafer is experimentally observed and analyzed both in transmission and reflection. These harmonic components, which are generated close to ... -
Harnessing magneto-electric interference to direct light emission with a split-ring resonator
(Universitat Politècnica de Catalunya, 2012-09-03)
Projecte Final de Màster Oficial
Accés obert[ANGLÈS] Here we show that a split-ring resonator, a structure widely known for its magnetic response at optical frequencies, can be used as a robust, unidirectional and broadband nanoantenna. By customizing its dimensions ... -
Hierarchically engineered fibrous scaffolds for bone regeneration
(2013-08-28)
Article
Accés obertSurface properties of biomaterials play a major role in the governing of cell functionalities. It is well known that mechanical, chemical and nanotopo- graphic cues, for example, influence cell proliferation and ... -
High hardness, low Young's modulus and low friction of nanocrystalline ZrW2 Laves phase and Zr1-xWx thin films
(2012-04)
Article
Accés restringit per política de l'editorialZr1−xWx nanocrystalline films of Zr-W solid solutions and ZrW2 Laves phase were synthesized by magnetron co-sputtering. Large values of the H/E ratio up to 0.09 are observed for grain sizes in the nanometer range along ... -
High hardness, low youngs modulus and low friction of nanocrystalline ZrW 2 laves phase and Zr 1-xW x thin films
(2012)
Article
Accés restringit per política de l'editorialZr1−xWx nanocrystalline films of Zr-W solid solutions and ZrW2 Laves phase were synthesized by magnetron co-sputtering. Large values of the H/E ratio up to 0.09 are observed for grain sizes in the nanometer range along ... -
High-pressure torsion of iron with various purity levels and validation of Hall-Petch strengthening mechanism
(2019-01-16)
Article
Accés obertImpurity atoms have a significant effect on the strength of metals processed by severe plastic deformation (SPD), but their strengthening mechanism is still under argument. To gain an insight into the strengthening ... -
High-quality crystalline optical nanoantennas
(Universitat Politècnica de Catalunya, 2012-09-10)
Projecte Final de Màster Oficial
Accés obert[ANGLÈS] Nowadays there is an increasing interest in high resolution nanopatterning of plasmonic structures. Several approaches mainly based on thermal evaporation of poly-crystalline metallic films are limited by the ... -
Highly catalytically active CeO2-x-based heterojunction nanostructures with mixed micro/meso-porous architectures
(2021)
Article
Accés obertAchieving high densities of accessible active sites in catalysts, which depend principally on the architecture of nanostructures, is critical to obtain enhanced performance. The present work introduces a template-free, ... -
Hybrid hydrogels with stimuli-responsive properties to electric and magnetic fields
(2023)
Capítol de llibre
Accés obertHydrogels are a promising type of soft material featuring great similarity to biological tissues due to their inherent characteristics, such as high-water content, flexibility, softness, or low elastic modulus. Imparting ... -
Hydrothermal assisted synthesis of iron oxide-based magnetic silica spheres and their performance in magnetophoretic water purifcation
(2012-05-06)
Article
Accés restringit per política de l'editorialPorous Magnetic Silica (PMS) spheres of about 400 nm diameter were synthesised by one-pot process using the classical St¿ber method combined with hydrothermal treatment. Maghemite nanoparticles (¿-Fe2O3) were used as fillers ... -
Influence of the isothermal cure temperature on the nanostructure and thermal properties of an epoxy layered silicate nanocomposite
(2013-03-08)
Article
Accés restringit per política de l'editorialThe cure kinetics of triglycidyl p-amino phenol (TGAP) epoxy resin with a diamine (4,4-diamino diphenyl sulphone [DDS]), reinforced with montmorillonite (MMT), has been studied by differential scanning calorimetry. The ... -
Influencia del contenido de oxigeno sobre la ductilidad del hierro de granos ultra finos obtenido por compactación en caliente
(Universitat Politècnica de Catalunya, 2014-02)
Projecte/Treball Final de Carrera
Accés obertSabiendo que las propiedades mecánicas de un metal están gobernadas por su microestructura y más precisamente por su tamaño de grano, la industria busca desarrollar materiales con un tamaño de grano nanométrico que tengan ...