Now showing items 262-281 of 417

    • Icon

      Nanolevitation Phenomena in Real Plane-Parallel Systems Due to the Balance between Casimir and Gravity Forces  [Article]

      Esteso Carrizo, Victoria; Carretero Palacios, Sol; Míguez García, Hernán Ruy (American Chemical Society, 2015-03)
      We report on the theoretical analysis of equilibrium distances in real plane-parallel systems under the influence of Casimir and gravity forces at thermal equilibrium. Due to the balance between these forces, thin films ...
    • Icon

      Nanometer-Scale Precision Tuning of 3D Photonic Crystals Made Possible Using Polyelectrolytes with Controlled Short Chain Length and Narrow Polydispersity  [Article]

      Zhuo, Wang; Calvo Roggiani, Mauricio; Masson, Georgeta; Arsenault, André C.; Peiris, Frank; Mamak, Marc; Míguez García, Hernán Ruy; Manners, Ian; Ozin, G.A. (Wiley-VCH, 2014)
      Nanometer‐scale tuning of the optical properties of prefabricated photonic crystals is achieved via layer‐by‐layer assembly of polyelectrolytes in the interstitial spaces of the photonic lattice. The key to the approach ...
    • Icon

      Nanoscale mechanically induced structural and electrical changes in Ge 2Sb 2Te 5 films  [Article]

      Cecchini, R.; Benítez Jiménez, José Jesús; Sánchez López, Juan Carlos; Fernández Camacho, Asunción (American Institute of Physics, 2012)
      We demonstrate that the microstructure and electrical properties of Ge 2Sb 2Te 5 films can be changed by a nanoscale mechanical process. Nanoscratching is used to define modified areas onto an as-deposited crystalline Ge ...
    • Icon

      Nanosilica supported CaO: A regenerable and mechanically hard CO2 sorbent at Ca-looping conditions  [Article]

      Sánchez Jiménez, Pedro Enrique; Pérez Maqueda, Luis Allan; Valverde Millán, José Manuel (Elsevier, 2014)
      This work presents a CO2 sorbent that may be synthesized from low-cost and widely available materials following a simple method basically consisting of impregnation of a nanostructured silica support with a saturated ...
    • Icon

      Nanostructured Ti thin films by magnetron sputtering at oblique angles  [Article]

      Álvarez, Rafael; García Martín, José Miguel; García-Valenzuela, Aurelio; Macías Montero, Manuel Jesús; Ferrer Fernández, Francisco Javier; Santiso, José; Cotrino Bautista, José; Rico Gavira, Víctor Joaquín; Rodríguez González-Elipe, Agustín; Palmero Acebedo, Alberto (Institute of Physics Publishing, 2016)
      The growth of Ti thin films by the magnetron sputtering technique at oblique angles and at room temperature is analysed from both experimental and theoretical points of view. Unlike other materials deposited in similar ...
    • Icon

      New bio-ceramization processes applied to vegetable hierarchical structures for bone regeneration: An experimental model in sheep  [Article]

      Filardo, Giuseppe; Kon, Elizaveta; Tampieri, Anna; Cabezas Rodríguez, Rafael; Di Martino, A.; Fini, M.; Giavaresi, G.; Lelli, M.; Martínez Fernández, Julián; Martini, L.; Ramírez Rico, Joaquín; Sañamanna, Francesca; Sandri, M.; Sprio, S.; Marcacci, M. (Mary Ann Liebert, 2014)
      Bone loss is still a major problem in orthopedics. The purpose of this experimental study is to evaluate the safety and regenerative potential of a new scaffold based on a bio-ceramization process for bone regeneration in ...
    • Icon

      New insights into surface-functionalized swelling high charged micas: Their adsorption performance for non-ionic organic pollutants  [Article]

      Pazos Zarama, Mery Carolina; Castro Arroyo, Miguel Ángel; Cota Reguero, Agustín; Pavón González, Esperanza; Alba Carranza, María Dolores; Osuna Barroso, Francisco Javier (Elsevier, 2017)
      The major components of the wastewater from the petroleum refineries are benzene, toluene and phenol and one of the techniques applied to the treatment of effluents is sorption using organo-functionalized clay. The materials ...
    • Icon

      New insights on the kinetic analysis of isothermal data: The independence of the activation energy from the assumed kinetic model  [Article]

      Sánchez Jiménez, Pedro Enrique; Perejón Pazo, Antonio; Pérez Maqueda, Luis Allan; Criado Luque, José Manuel (American Chemical Society, 2015)
      Isothermal experiments are widely employed to study the kinetics of solid-state reactions or processes to extract essential kinetic information needed for modeling the processes at an industrial scale. The kinetic analysis ...
    • Icon

      O2-assisted Water Gas Shift reaction over structured Au and Pt catalysts  [Article]

      González Castaño, Míriam; Ramírez Reina, Tomás; Ivanova, Svetlana; Martínez Tejada, Leidy Marcela; Centeno Gallego, Miguel Ángel; Odriozola Gordón, José Antonio (Elsevier, 2016)
      Platinum and gold structured catalysts were compared as active phases in classical and O2-assisted Water Gas Shift (WGS) reaction. Both metals were supported on iron-doped ceria mixed oxide and then, structured on metallic ...
    • Icon

      On the formation of the porous structure in nanostructured a-Si coatings deposited by dc magnetron sputtering at oblique angles  [Article]

      Fortio Godinho, Vanda Cristina; Moskovkin, P.; Álvarez, Rafael; Caballero Hernández, Jaime; Schierholz, R.; Bera, B.; Demarche, J.; Palmero Acebedo, Alberto; Fernández Camacho, Asunción; Lucas, S. (Institute of Physics Publishing, 2014)
      The formation of the porous structure in dc magnetron sputtered amorphous silicon thin films at low temperatures is studied when using helium and/or argon as the processing gas. In each case, a-Si thin films were simultaneously ...
    • Icon

      On the microstructure of thin films grown by an isotropically directed deposition flux  [Article]

      Álvarez Molina, Rafael; Romero Gómez, Pablo; Gil Rostra, Jorge; Cotrino Bautista, José; Yubero Valencia, Francisco; Palmero Acebedo, Alberto; Rodríguez González-Elipe, Agustín (American Institute of Physics, 2010)
      The influence of isotropically directed deposition flux on the formation of the thin film microstructure at low temperatures is studied. For this purpose we have deposited TiO2 thin films by two different deposition ...
    • Icon

      On the relevant role of solids residence time on their CO2 capture performance in the Calcium Looping technology  [Article]

      Perejón Pazo, Antonio; Miranda Pizarro, Juan; Pérez Maqueda, Luis Allan; Valverde Millán, José Manuel (Pergamon Press, 2016)
      The multicycle CO capture performance of CaO derived from natural limestone and dolomite has been investigated by means of thermogravimetry under realistic Calcium-Looping conditions, which necessarily involve high CO ...
    • Icon

      One-reactor plasma assisted fabrication of ZnO@TiO2 multishell nanotubes: assessing the impact of a full coverage on the photovoltaic performance  [Article]

      Filippin, A. Nicolas; Macías Montero, Manuel Jesús; Saghi, Zineb; Idígoras, Manuel Jesús; Sánchez Valencia, Juan Ramón; Barranco Quero, Ángel; Migdley, Paul.A; Anta Montalvo, Juan Antonio; Borrás Martos, Ana Isabel (Nature Publishing Group, 2017)
      This paper addresses the fabrication of vertically aligned ZnO@TiO2 multishell nanotubes by a combined full vacuum-plasma approach at mild temperatures. The growth is carried out within the premises of a one-reactor approach, ...
    • Icon

      Operando DRIFTS-MS Study of WGS and rWGS Reaction on Biochar-Based Pt Catalysts: The Promotional Effect of Na  [Article]

      Santos, José L.; Bobadilla Baladrón, Luis Francisco; Centeno Gallego, Miguel Ángel; Odriozola Gordón, José Antonio (MDPI, 2018)
      Biochar-based Pt catalysts, unpromoted and Na-promoted, were prepared by an incipient wetness impregnation method and characterised by Inductively coupled plasma mass spoectrometry (ICP-MS) analysis, X-ray diffraction, N2 ...
    • Icon

      Optical analysis of CH3NH3SnxPb1–xI3 absorbers: a roadmap for perovskite-on-perovskite tandem solar cells  [Article]

      Anaya Martín, Miguel; Correa Baena, Juan P.; Lozano Barbero, Gabriel Sebastián; Saliba, Michael; Anguita, Pablo; Calvo Roggiani, Mauricio; Míguez García, Hernán Ruy (Royal Society of Chemistry, 2016)
      Organic–inorganic perovskite structures in which lead is substituted by tin are exceptional candidates for broadband light absorption. Herein we present a thorough analysis of the optical properties of CH3NH3SnxPb1–xI3 ...
    • Icon

      Optical Description of Mesostructured Organic-Inorganic Halide Perovskite Solar Cells  [Article]

      Anaya Martín, Miguel; Lozano Barbero, Gabriel Sebastián; Calvo Roggiani, Mauricio; Zhang, Wei; Johnston, Michael B.; Snaith, Henry J.; Míguez García, Hernán Ruy (2015)
      Herein we describe both theoretically and experimentally the optical response of solution-processed organic-inorganic halide perovskite solar cells based on mesostructured scaffolds. We develop a rigorous theoretical ...
    • Icon

      Optical design of all-perovskite tandem solar cells  [Article]

      Lozano Barbero, Gabriel Sebastián; Anaya Martín, Miguel; Calvo Roggiani, Mauricio; Míguez García, Hernán Ruy (Optical Society of America, 2017)
      We present a thorough analysis of the optical properties of CH 3NH 3Sn xPb1-x I 3 films, providing the field with definitive insights about the possibilities of these materials for perovskite solar cells of superior efficiency.
    • Icon

      Optical interference effects on the Casimir-Lifshitz force in multilayer structures  [Article]

      Esteso Carrizo, Victoria; Carretero Palacios, Sol; Míguez García, Hernán Ruy (American Physical Society, 2020)
      The Casimir-Lifshitz force F(C−L) between planar objects when one of them is stratified at the nanoscale is herein investigated. Layering results in optical interference effects that give rise to a modification of the ...
    • Icon

      Optical Responses of Localized and Extended Modes in a Mesoporous Layer on Plasmonic Array to Isopropanol Vapor  [Article]

      Murai, Shunsuke; Cabello Olmo, Elena; Kamakura, Ryosuke; Calvo, Mauricio E.; Lozano Suárez, Juan Gabriel; Atsumi, Taisuke; Míguez, Hernán; Tanaka, Katsuhisa (American Chemical Society, 2020)
      Mesoporous silica features open and accessible pores that can intake substances from the outside. The combination of mesoporous silica with plasmonic nanostructures represents an interesting platform for an optical ...
    • Icon

      Optimizing the Curie temperature of pseudo-binary RxR'2-xFe17 (R,R' = rare earth) for magnetic refrigeration  [Article]

      Alvarez Alonso, Pablo; Gorria, Pedro; Cuello, Grabiel; Puente Orench, Inés; Sánchez Llamazares, José L.; Franco García, Victorino; Reiffers, Miriam; Blanco, Jesús A. (IOP Publishing, 2014)
      Several pseudo-binary RxR'2-xFe17 alloys (with R = Y, Ce, Pr, Gd and Dy) were synthesized with rhombohedral Th2Zn17-type crystal structure determined from x-ray and neutron powder diffraction. The choice of compositions ...