Now showing items 90-109 of 414

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      Deep insight into Zr/Fe combination for successful Pt/CeO2/Al2O3 WGS catalyst doping  [Article]

      González Castaño, Míriam; Ivanova, Svetlana; Ioannides, T.; Centeno Gallego, Miguel Ángel; Odriozola Gordón, José Antonio (Royal Society of Chemistry (Great Britain), 2017)
      Efficient promotion of the Pt/CeO/AlO catalytic system was achieved by the addition of two different ceria promoters, Zr and Fe. From the exhaustive data analysis, the key features for enhanced catalytic performance and ...
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      Defect chemistry and electrical properties of BiFeO3  [Article]

      Schrade, Mattias; Masó, Nahum; Perejón Pazo, Antonio; Pérez Maqueda, Luis Allan; West, Anthony R. (Royal Society of Chemistry (Great Britain), 2017)
      BiFeO attracts considerable attention for its rich functional properties, including room temperature coexistence of magnetic order and ferroelectricity and more recently, the discovery of conduction pathways along ferroelectric ...
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      Dependence of exchange anisotropy and coercivity on the Fe–oxide structure in oxygen-passivated Fe nanoparticles  [Article]

      Prados, C.; Multigner, M.; Hernando, Antonio; Sánchez López, Juan Carlos; Fernández Camacho, Asunción; Conde Amiano, Clara Francisca; Conde Amiano, Alejandro (American Institute of Physics, 1999)
      Ultrafine Fe particles have been prepared by the inert gas condensation method and subsequently oxygen passivated. The as-obtained particles consist in an Fe core surrounded by an amorphous Fe-oxide surface layer. The ...
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      Dependence of the preexponential factor on temperature  [Article]

      Criado Luque, José Manuel; Pérez Maqueda, Luis Allan; Sánchez Jiménez, Pedro Enrique (Springer Verlag, 2005)
      The dependence of the preexponential factor on the temperature has been examined and the errors involved in the activation energy calculated from isothermal and non-isothermal methods without considering such dependence ...
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      Desarrollo de diagnósticos para plasmas: catalizador de nueva física  [Article]

      McKarthy, Kieran J.; Sola, Antonio; Anabitarte, E.; Bordel, N; Cotrino Bautista, José; Gómez Aleixandre, C; Mar, Santiago; Martínez, R; Rodríguez Prieto, G; Tanarro, Isabel; Trujillo Bueno, Javier; Gordillo Vázquez, Francisco José (Real Sociedad Española de Física, 2013)
      Los diagnósticos constituyen una parte fundamental de los estudios de plasmas, sean plasmas atmosféricos o astrofísicos, plasmas fríos dedicados a estudios de ciencia básica o a aplicaciones industriales, o plasmas calientes ...
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      Design and Realization of a Novel Optically Disordered Material: A Demonstration of a Mie Glass  [Article]

      Miranda Muñoz, José María; Lozano Barbero, Gabriel Sebastián; Míguez García, Hernán Ruy (Wiley-Blackwell, 2017)
      Herein, a diffusive material presenting optical disorder is introduced, which represents an example of a Mie glass. Comprising spherical crystalline TiO nanoparticles randomly dispersed in a mesoporous TiO matrix, it is ...
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      Design and realization of transparent solar modules based on luminescent solar concentrators integrating nanostructured photonic crystals  [Article]

      Jiménez Solano, Alberto; Delgado Sánchez, José M.; Calvo Roggiani, Mauricio; Miranda Muñoz, José María; Lozano Barbero, Gabriel Sebastián; Sancho, Diego; Sánchez Cortezón, Emilio; Míguez García, Hernán Ruy (John Wiley & Sons, 2015)
      Herein, we present a prototype of a photovoltaic module that combines a luminescent solar concentrator integrating one-dimensional photonic crystals and in-plane CuInGaSe2 (CIGS) solar cells. Highly uniform and wide-area ...
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      Detecting single-electron events in TEM using low-cost electronics and a silicon strip sensor  [Article]

      Gontard, Lionel C.; Moldovan, Grigore; Carmona Galán, Ricardo; Lin, Chao; Kirkland, Angus I. (Oxford University Press, 2014)
      There is great interest in developing novel position-sensitive direct detectors for transmission electron microscopy (TEM) that do not rely in the conversion of electrons into photons. Direct imaging improves contrast and ...
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      Determination of Pore Size Distribution at the Cell-Hydrogel Interface  [Article]

      Leal Egaña, Aldo; Dietrich-Braumann, Ulf; Díaz Cuenca, Aranzazu; Nowicki, Marcin; Bader, Augustinus (BioMed Central, 2011)
      Abstract Background Analyses of the pore size distribution in 3D matrices such as the cell-hydrogel interface are very useful when studying changes and modifications produced as a result of cellular growth and proliferation ...
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      Determination of texture by infrared spectroscopy in titanium oxide–anatase thin films  [Article]

      Pecharromán, Carlos; Gracia Torres, Francisco; Holgado Vázquez, Juan Pedro; Ocaña Jurado, Manuel; Rodríguez González-Elipe, Agustín; Bassas, J.; Santiso, José; Figueras, Albert (American Institute of Physics, 2003)
      A theoretical model to determine the effective dielectric tensor of heterogeneous materials composed by anisotropic microcrystallites has been introduced to explain the infrared spectral features of textured thin films of ...
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      Development by Mechanochemistry of La0.8Sr0.2Ga0.8Mg0.2O2.8 Electrolyte for SOFCs  [Article]

      Garcia-Garcia, FJ; Tang, Yunqing; Sayagués de Vega, María Jesús; Gotor Martínez, Francisco José (MDPI, 2020)
      In this work, a mechanochemical process using high-energy milling conditions was employed to synthesize La0.8Sr0.2Ga0.8Mg0.2O3-δ (LSGM) powders from the corresponding stoichiometric amounts of La2O3, SrO, Ga2O3, and MgO ...
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      Development of a universal sample controlled thermal analysis (SCTA) system for being used with any thermoanalytical instrument  [Article]

      Criado Luque, José Manuel; Pérez Maqueda, Luis Allan; Diánez Millán, María Jesús; Sánchez Jiménez, Pedro Enrique (Akadémiai Kiadó, 2007)
      The SCTA method implies to control the te mperature in such a way that the reaction rate changes with the time according to a function previously defined by the user. Constant Rate Thermal Analysis ...
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      Development of multicomponent-multiphase materials based on (Ti, Ta, Nb)CxN1-x carbonitride solid solutions  [Article]

      Córdoba Gallego, José Manuel; Chicardi Augusto, Ernesto; Gotor Martínez, Francisco José (Elsevier, 2012)
      A set of powdered cermets based on (Ti,Ta,Nb)C xN 1-x carbonitride solid solutions were synthesized from mixtures of elemental powders by a mechanically induced self-sustaining reaction (MSR) method and subsequently sintered ...
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      Differences in n-type doping efficiency between Al- and Ga-ZnO films  [Article]

      Gabàs, Mercedes; Landa Cánovas, Ángel; Costa Krämer, José Luis; Agulló Rueda, F.; Rodríguez González-Elipe, Agustín; Díaz Carrasco, P.; Hernández Moro, Jorge; Lorite, Israel; Herrero, Pilar; Castillero Durán, Pedro; Barranco Quero, Ángel; Ramos Barrado, J. Ramón (American Institute of Physics, 2013)
      A careful and wide comparison between Al and Ga as substitutional dopants in the ZnO wurtzite structure is presented. Both cations behave as n-type dopants and their inclusion improves the optical and electrical properties ...
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      Differences in the Catalytic Behavior of Au-Metalized TiO2 Systems During Phenol Photo-Degradation and CO Oxidation  [Article]

      Laguna Espitia, Oscar Hernando; Murcia Mesa, Julie Joseane; Rojas Sarmiento, Hugo Alfonso; Jaramillo Páez, César Augusto; Navío Santos, José Antonio; Hidalgo López, María del Carmen (Multidisciplinary Digital Publishing Institute (MDPI), 2019-04-03)
      For this present work, a series of Au-metallized TiO 2 catalysts were synthesized and characterized in order to compare their performance in two different catalytic environments: the phenol degradation that occurs during ...
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      Direct evidence of Lowenstein's rule violation in swelling high-charge micas  [Article]

      Pavón González, Esperanza; Osuna Barroso, Francisco Javier; Alba Carranza, María Dolores; Delevoye, L. (The Royal Society of Chemistry, 2012)
      The structure of high-charged micas, Na-n-micas (n = 2 and 4), a family of synthetic silicates with a wide range of applications, was investigated through the use of 17O solid-state NMR at natural abundance in order to ...
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      Direct mechanosynthesis of pure BiFeO3 perovskite nanoparticles: reaction mechanism  [Article]

      Perejón Pazo, Antonio; Murafa, Nataliya; Sánchez Jiménez, Pedro Enrique; Criado Luque, José Manuel; Diánez Millán, María Jesús; Pérez Maqueda, Luis Allan (Royal Society of Chemistry (Great Britain), 2013)
      In this work, a mechanochemical procedure is proposed as a simple and fast method to synthesize the pure BiFeO3 perovskite phase as a nanostructured material without the need for purification treatments, while the ...
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      Direct observation of doping incorporation pathways in self-catalytic GaMnAs nanowires  [Article]

      Kasama, Takeshi; Thuvander, M.; Siusys, A.; Cervera Gontard, Lionel; Kovács, A.; Yazdi, S.; Duchamp, Martial; Gustafsson, A.; Dunin-Borkowski, Rafal E.; Sadowski, J. (American Institute of Physics, 2015)
      Doping mechanisms of Mn in GaAs nanowires (NWs) that have been grown self-catalytically at 600 C by molecular beam epitaxy (MBE) are investigated using advanced electron microscopy techniques and atom probe tomography. Mn ...
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      Diverse Applications of Nanomedicine  [Article]

      Escudero Belmonte, Alberto; Pelaz, Beatriz; Alvarez Puebla, Ramon A.; Ballerini, Laura; Carril, Mónica; Oliveira, Jose; Youqing Shen (American Chemical Society, 2017-03-28)
      The design and use of materials in the nanoscale size range for addressing medical and health-related issues continues to receive increasing interest. Research in nanomedicine spans a multitude of areas, including drug ...
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      Dye sensitized solar cells as optically random photovoltaic media  [Article]

      Gálvez López, Francisco Enrique; Barnes, Piers R. F.; Halme, Janne; Míguez García, Hernán Ruy (Royal Society of Chemistry (Great Britain), 2014)
      n order to enhance optical absorption, light trapping by multiple scattering is commonly achieved in dye sensitized solar cells by adding particles of a different sort. Herein we propose a theoretical method to find the ...