Now showing items 1-14 of 14

    • IconBacterial behavior on coated porous titanium substrates for biomedical applications  [Article]

      Domínguez-Trujillo, Cristina; Garvi Higueras, María Dolores; Salazar-Moya, Alba; Lebrato Martínez, Julián; Rodríguez-Ortiz, José Antonio; Lebrato Vázquez, Clara; Torres Hernández, Yadir; Beltrán, A.M. (Elsevier, 2019)
      In this work, bacterial behavior on dense and porous titanium substrates is discussed. Porous titanium was fabricated by a space holder technique (using 50 vol%, NH4HCO3 with particle sizes between 250 and 355 μm). These ...
    • IconCompositional analysis of InAs-GaAs-GaSb heterostructures by Low-Loss Electron Energy Loss Spectroscopy  [Article]

      Beltrán, A.M.; Ben, Teresa; Sánchez, A. M.; Gass, M.H.; Taboada, Alfonso G.; Ripalda, José María; Molina, Sergio I. (Institute of Physics Publishing, 2013)
      As an alternative to Core-Loss Electron Energy Loss Spectroscopy, Low-Loss EELS is suitable for compositional analysis of complex heterostructures, such as the InAs-GaAsGaSb system, since in this energy range the edges ...
    • IconEngineering of III-Nitride Semiconductors on Low Temperature Co-fired Ceramics  [Article]

      Manuel Delgado, Jose Manuel; Jiménez Ríos, Juan Jesús; Morales Sánchez, Francisco Miguel; Lacroix, Bertrand; Santos Izquierdo-Bueno, Antonio Jesús; García Roja, Rafael; Blanco Ollero, Eduardo; Domínguez de la Vega, Manuel; Ramírez del Solar, Milagrosa; Beltrán, A.M.; Alexandrov, D.; Tot, J.; Dubreuil, R.; Videkov, V.; Andreev, S.; Tzaneva, B.; Bartsch, H.; Breiling, J.; Pezoldt, J.; Fischer, M.; Müller, J. (Nature Publishing Group, 2018)
      This work presents results in the feld of advanced substrate solutions in order to achieve high crystalline quality group-III nitrides based heterostructures for high frequency and power devices or for sensor applications. ...
    • IconHigh performance novel gadolinium doped ceria/yttria stabilized zirconia/nickel layered and hybrid thin film anodes for application in solid oxide fuel cells  [Article]

      García-García, Francisco J.; Beltrán, A.M.; Yubero Valencia, Francisco; González-Elipe, Agustín R.; Lambert, R. M. (Elsevier, 2017)
      Magnetron sputtering under oblique angle deposition was used to produce Ni-containing ultra thin film anodes comprising alternating layers of gadolinium doped ceria (GDC) and yttria stabilized zirconia (YSZ) of either 200 ...
    • IconIncorporation of Sb in InAs/GaAs quantum dots  [Article]

      Molina, Sergio I.; Sánchez, A. M.; Beltrán, A.M.; Sales, David L.; Ben, Teresa; Chisholm, M. F.; Varela, María; Pennycook, Stephen J.; Galindo, P. L.; Papworth, A. J.; Goodhew, P. J.; Ripalda, José María (American Institute of Physics, 2007)
      The formation of a quaternary InGaAsSb alloy is shown to occur in the core of epitaxial GaSb capped InAs/GaAs quantum dots emitting at 1.3 m. The existence of the four constituent elements is demonstrated by using spatially ...
    • IconStrong activation effect on a ru-co-c thin film catalyst for the hydrolysis of sodium borohydride  [Article]

      Arzac, G. M.; Paladini, M.; Godinho, V.; Beltrán, A.M.; Jiménez de Haro, María del Carmen (2018)
      In this work, we prepared a series of Ni foam supported Ru-Co, Ru-Co-B and Ru-Co-C catalysts in the form of columnar thin films by magnetron sputtering for the hydrolysis of sodium borohydride. We studied the activity and ...
    • IconStructural and optical changes induced by incorporation of antimony into InAs/GaAs(001) quantum dots  [Article]

      Taboada, Alfonso G.; Sánchez, A. M.; Beltrán, A.M.; Bozkurt, M.; Alonso-Álvarez, Diego; Alén, Benito; Rivera, A.; Ripalda, José María; Llorens Montolio, José Manuel; Martín-Sánchez, Javier; González Díez, Yolanda; Ulloa, J. M.; García Martínez, Jorge Manuel; Molina, Sergio I.; Koenraad, P.M. (American Physical Society, 2010)
      We present experimental evidence of Sb incorporation inside InAs/GaAs 001 quantum dots exposed to an antimony flux immediately before capping with GaAs. The Sb composition profile inside the nanostructures as measured by ...
    • IconSurface modification of Ti-6Al-4V alloys manufactured by selective laser melting: Microstructural and tribo-mechanical characterization  [Article]

      Torres Hernández, Yadir; Sarria, Perla; Gotor Martínez, Francisco José; Gutiérrez, Eliel; Peón, Eduardo; Beltrán, A.M.; González, Jesús E. (Elsevier, 2018)
      Medical grade of both titanium (Ti) and Ti6Al4V alloy are recognized as the metallic biomaterials with the better outcomes for clinical repair of bone tissue thanks to their suitable mechanical properties and corrosion ...
    • IconSynthesis of a cubic Ti(BCN) advanced ceramic by a solid-gas mechanochemical reaction  [Article]

      Chicardi Augusto, Ernesto; García Garrido, Cristina; Beltrán, A.M.; Sayagués de Vega, María Jesús; Gotor Martínez, Francisco José (Elsevier, 2018-11-12)
      In this work, a titanium boron carbonitride advanced ceramic was successfully synthesised by a solid-gas mechanochemical reaction in a planetary ball mill from a mixture of elemental Ti, B, and C under nitrogen atmosphere. ...
    • IconTailor-made preparation of Co–C, Co–B, and Co catalytic thin films using magnetron sputtering: insights into structure–composition and activation effects for catalyzed NaBH4 hydrolysis  [Article]

      Paladini, M.; Godinho, V.; Arzac, G. M.; Jiménez de Haro, María del Carmen; Beltrán, A.M.; Fernández-Barbero, Antonio (Royal Society of Chemistry, 2016)
      The magnetron sputtering (MS) methodology is a powerful tool for tailor-made fabrication of Co-based thin film catalysts with controlled microstructures and compositions for sodium borohydride (SBH) hydrolysis. In particular, ...
    • IconTheoretical modelling of quaternary GaInAsSb/GaAs self-assembled quantum dots  [Article]

      Llorens Montolio, José Manuel; Taboada, Alfonso G.; Ripalda, José María; Alonso-Álvarez, Diego; Alén, Benito; Martín-Sánchez, Javier; García Martínez, Jorge Manuel; González Díez, Yolanda; Sánchez, A. M.; Beltrán, A.M.; Galindo, P. L.; Molina, Sergio I. (Institute of Physics Publishing, 2010)
      InAs/GaAs quantum dots exposed to Sb after growth exhibit spectral changes. We study in the present paper an idealized nanostructure consisting of a homogeneous distribution of the quaternary GaInAsSb surrounded by a barrier ...
    • IconTiming of calcium nitrate addition affects morphology, dispersity and composition of bioactive glass nanoparticles  [Article]

      Zheng, Kai; Taccardi, Nicola; Beltrán, A.M.; Sui, Baiyan; Zhou, Tian; Reddy Marthala, V.R.; Hartmann, Martin; Boccaccini, Aldo R. (Royal Society of Chemistry, 2016)
      Bioactive glass nanoparticles (BGN) are promising materials for a number of biomedical applications. Many parameters related to the synthesis of BGN using sol–gel methods can affect their characteristics. In this study, the ...
    • IconTransfer of Individual Micro- and Nanoparticles for High- Precision 3D Analysis Using 360° Electron Tomography  [Article]

      Przybilla, Thomas; Zubiri, Benjamin; Beltrán, A.M.; Butz, Benjamin; Machoke, Albert Gonche; Inayat, Alexandra; Distaso, Monica; Peukert, Wolfgang; Schwieger, Wilhelm; Spiecker, Erdmann (Wiley, 2018)
      A versatile approach is demonstrated, providing a general routine for an extensive and advanced 3D characterization of individually selected micro- and nanoparticles, enabling the combination of complementary and scale-bridging ...
    • IconUniform surface modification of 3D Bioglass®-based scaffolds with mesoporous silica particles (McM-41) for enhancing drug delivery capability  [Article]

      Boccardi, Elena; Philippart, Anahí; Juhasz-Bortuzzo, Judith A.; Beltrán, A.M.; Novajra, Giorgia; Vitale-Brovarone, Chiara; Spiecker, Erdmann; Boccaccini, Aldo R. (Frontiers Media, 2015)
      The design and characterization of a new family of multifunctional scaffolds based on bioactive glass (BG) of 45S5 composition for bone tissue engineering and drug delivery applications are presented. These BG-based scaffolds ...