Browsing by Subject "Nanopartícules"

Now showing items 21-40 of 194

    • CO oxidation and COPrOx over preformed Au nanoparticles supported over nanoshaped CeO2 

      Soler Turu, Lluís; Casanovas Grau, Albert; Urrich, Aitor; Angurell Purroy, Inmaculada; Llorca Piqué, Jordi (2016-02-10)
      Article
      Open Access
      Au/CeO2 (0.25% wt. Au) catalysts were prepared by anchoring preformed Au nanoparticles over ceria polycrystals, cubes and rods and tested in the oxidation of CO and COPrOx. The use of preformed Au nanoparticles assured a ...

    • Co-Al spinel-based nanoparticles synthesized by flame spray pyrolysis for glycerol conversion 

      Lähde, A.; Chimentao, Ricardo J.; Karhunen, T.; Alvarez, Mayra G.; Llorca Piqué, Jordi; Medina Mena, Francisco; Jokiniemi, J.; Modesto Lopez, Luis B. (2017-12)
      Article
      Open Access
      The catalytic properties of Co-Al spinel nanoparticles prepared by liquid-feed flame spray pyrolysis (L-F FSP) were investigated in the glycerol conversion in gas phase in an atmosphere of hydrogen. Reduction at 1123¿K of ...

    • Colloidal Ni-Co-Sn nanoparticles as efficient electrocatalysts for the methanol oxidation reaction 

      Li, Junshan; Luo, Zhishan; He, Feng; Zuo, Yong; Zang, Chaoqui; Liu, Junfeng; Yu, Xiaoting; Du, Ruifeng; Zhang, Ting; Infante Carrió, Maria F.; Tang, Pengyi; Arbiol, Jordi; Llorca Piqué, Jordi; Cabot Codina, Andreu (Royal Society of Chemistry (RSC), 2018-01-01)
      Article
      Open Access
      The deployment of direct methanol fuel cells requires engineering cost-effective and durable electrocatalysts for the methanol oxidation reaction (MOR). As an alternative to noble metals, Ni-based alloys have shown excellent ...

    • Compositionally tuned Ni x Sn alloys as anode materials for lithium-ion and sodium-ion batteries with a high pseudocapacitive contribution 

      Li, Junshan; Xu, Xijun; Luo, Zhishan; Zhang, Chaoqi; Yu, Xiaoting; Zuo, Yong; Albiol, Jordi; Llorca Piqué, Jordi; Cabot, Andreu (2019-05-01)
      Article
      Restricted access - publisher's policy
      Nickel tin alloy nanoparticles (NPs) with tuned composition NixSn (0.6¿=¿x¿=¿1.9) were synthesized by a solution-based procedure and used as anode materials for Li-ion batteries (LIBs) and Na-ion batteries (SIBs). Among ...

    • Cooperative signal amplification for molecular communication in nanonetworks. 

      Abadal Cavallé, Sergi (Universitat Politècnica de Catalunya, 2011-09-19)
      Master thesis
      Open Access
      English: Nanotechnology is enabling the development of devices in a scale ranging from a few to hundreds of nanometers. Communication between these devices greatly expands the possible applications, increasing the complexity ...

    • Corrosion protection of carbon steel by silica-based hybrid coatings containing cerium salts: Effect of silica nanoparticle content 

      Santana, Ianina; Pepe, Andrés; Jiménez Piqué, Emilio; Pellice, Sergio; Milosev, Ingrid; Ceré, Silvia M. (2015-03-15)
      Article
      Open Access
      One strategy for minimising corrosive attack on carbon steel involves the application of hybrid coatings rich in rare earths, on the basis of their low toxicity and environmental sustainability. Tetraethoxysilane (TEOS) ...

    • Co–Sn nanocrystalline solid solutions as anode materials in lithium-ion batteries with high pseudocapacitive contribution 

      Li, Junshan; Xu, Xijun; Luo, Zhishan; Zhang, Chaoqi; Zuo, Yong; Zhang, Ting; Tang, Pengyi; Infante Carrió, Maria F.; Arbiol, Jordi; Llorca Piqué, Jordi; Liu, Jun; Cabot, Andreu (2019-04-05)
      Article
      Open Access
      Co–Sn solid-solution nanoparticles with Sn crystal structure and tuned metal ratios were synthesized by a facile one pot solution-based procedure involving the initial reduction of a Sn precursor followed by incorporation ...

    • Cytotoxicity and antibacterial activity of selected ananoparticles 

      Ribera Puig, Joan (Universitat Politècnica de Catalunya, 2017-07-04)
      Bachelor thesis
      Restricted access - author's decision
      Nowadays, nanotechnologies are ones of the newest technologies, which a wide range of applications such as in medicine, biotechnology, electronics, energy or sensing. However, the efficiency of nanomaterials or at least ...

    • Degradation of organic pollutants by metallic particles 

      Rosell Illa, Laura (Universitat Politècnica de Catalunya, 2014-07-09)
      Bachelor thesis
      Open Access
      Nowadays, nanoparticles are studied for many technological applications in various fields, such as medicine, electronics, environmental care, pharmaceuticals, cosmetics, textiles and agriculture. The main interest of ...

    • Desenvolupament d'hidroxiapatita a partir de nanopartícules de carbonat de calci i fosfats per l'eliminació de metalls en aigües subterrànies 

      Marín López, Alex (Universitat Politècnica de Catalunya, 2018-07-02)
      Bachelor thesis
      Restricted access - author's decision
      La retenció de metalls en les aigües subterrànies es pot realitzar mitjançant la seva adsorció/precipitació sobre hidroxiapatita. La utilització d'aquests materials adsorbents amb una grandària nanomètrica permetria accelerar ...

    • Desenvolupament de sensors per a la detecció de contaminants en dissolucions aquoses basats en nanomaterials 

      de la Cruz Ybern, Paula (Universitat Politècnica de Catalunya, 2013-11)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      Aquest treball es desenvolupa en el context actual global de major consciència envers la preservació del medi ambient i, per tant, de restriccions més estrictes a la legislació sobre els contaminants en medis aquàtics. ...

    • Desenvolupament i optimització de nous recobriments decoratius basats en nanopartícules d’ or en matriu dielèctrica de TiO2 

      Torrell Faro, Marc (Universitat Politècnica de Catalunya, 2011-05)
      Master thesis (pre-Bologna period)
      Open Access
      Aquest projecte presenta el treball d’investigació que s’ha realitzat amb l’objectiu d’obtenir, mitjançant tecnologies de polvorització catòdica o PVD (Physical Vapor Deposition), revestiments nanocompostos formats per ...

    • Development of a novel interdigitated capacitor 

      Soler Muñoz, Oriol (Universitat Politècnica de Catalunya, 2018-07)
      Bachelor thesis
      60 months embargo
      Realization/ Investigation of a novel interdigitated capacitor and its efficiency from a nanoparticle deposit (SiO2) and/or an electrolytic gel model.

    • Development of a tracking code for active micro and nanomotors 

      Miguel López, Albert (Universitat Politècnica de Catalunya, 2015-10-27)
      Bachelor thesis
      120 months embargo
      Covenantee:   Max Plank Institute
      Micro and nanomotors (NM) are small devices capable of autonomous propulsion. With the development of new techniques for nanofabrication there is as much ability as ever to synthesize NM, and interest in them has been ...

    • Development of polymeric hollow fiber membranes containing catalytic metal nanoparticles 

      Macanás de Benito, Jorge; Ouyang, Lu; Bruening, Merlin L.; Muñoz Tapia, Maria; Remigy, Jean-Christophe; Lahitte, Jean-François (2010-10-31)
      Article
      Open Access
      Metal nanoparticles (MNPs) have unique physico-chemical properties advantageous for catalytic applications which differ from bulk material. However, the main drawback of MNPs is their insufficient stability due to a high ...

    • Development of Vapor Deposition Processes for OLEDs 

      Lungu, Alexandru-Andrei (Universitat Politècnica de Catalunya, 2014-09-28)
      Bachelor thesis
      Open Access
      Covenantee:   Universität Stuttgart
      This bachelor thesis describes the development of vapour deposition processes for the creation of a warm white OLED. An OLED is a layer or a stack of organic materials situated between two electrodes, which emits light ...

    • Diffusion-based physical channel Identification for Molecule Nanonetworks 

      Garralda Torres, Nora (Universitat Politècnica de Catalunya, 2011-04-27)
      Master thesis
      Open Access
      Català: El treball és una exploració del canal de difusió molecular per nanoredes moleculars, en el qual s'identifica la resposta impulsional i en freqüència del canal, es comprova la seva linealitat i invariància i ...

    • Dispersion of gamma-alumina nano-sized spherical particles in a calamitic liquid Crystal. Study and optimization of the confinement effects 

      Díez Berart, Sergio; López Pérez, David Orencio; Sebastian Ugarteche, Nerea; de la Fuente, M.R.; Salud Puig, Josep; Robles Hernández, Beatriz; Pérez Jubindo, M.A. (2014-03-01)
      Article
      Open Access
      We report an experimental study on confined systems formed by butyloxybenzylidene octylaniline liquid crystal (4O.8) + gamma-alumina nanoparticles. The effects of the confinement in the thermal and dielectric properties ...

    • Disseny i producció de vidres metàl·lics granulars amb magnetoresistència gegant 

      Colom Serra, Mateu (Universitat Politècnica de Catalunya, 2016-06-08)
      Bachelor thesis
      Open Access
      A granular metallic glass is an amorphous metall with nanocristalline phases incrusted on it. The effect of giant magnetoresistance (decrease of electrical resistance due to the presence of a magnetic field) is a quantum ...

    • Donnan-exclusion-driven distribution of catalytic ferromagnetic nanoparticles synthesized in polymeric fibers 

      Alonso González, Amanda; Macanás de Benito, Jorge; Shafir, Alexandr; Muñoz Tapia, Maria; Vallribera Massó, Adelina; Prodius, Denis; Melnic, Silvia; Turta, Constantin; Muraviev, Dmitri N. (Royal Society of Chemistry, 2010-01-27)
      Article
      Restricted access - publisher's policy
      One of the routes to overcome the high instability of metal nanoparticles (MNPs) lies in the use of polymeric materials for their synthesis and stabilization. Besides, one of the most serious concerns associated with the ...