Ara es mostren els items 1-20 de 43

  • 3D metallo-dielectric structures combining electrochemical and electroplating techniques 

    Hernández Díaz, David; Lange, D.; Todorov Trifonov, Trifon; Garin Escriva, Moises; García Molina, Francisco Miguel; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2010-06)
    Article
    Accés restringit per política de l'editorial
    Three-dimensional (3D) periodic nickel micro-structures with a periodicity of 4 μm and high number of structural periods were fabricated by electrodeposition. Macroporous silicon, consisting of periodic arrays of sine-wave ...
  • A million-channel CO-PrOx microreactor on a fingertip for fuel cell application 

    Llorca Piqué, Jordi; Rosell, O.; Divins, N.J.; López, E.; Roig Costa, Maria; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; González de Rivera, F.; Rodríguez, L.I.; Seco, M. (2010)
    Article
    Accés restringit per política de l'editorial
    A silicon micromonolith containing ca.40000 regular channels of 3.3 μm in diameter per square millimeter has been successfully functionalized with anAu/TiO2 catalyst for CO preferential oxidation(CO-PrOx) in the presence ...
  • Analysis of photonic band gaps in two-dimensional photonic crystals with rods covered by a thin interfacial layer 

    Todorov Trifonov, Trifon; Marsal, L F; Rodríguez Martínez, Ángel; Pallarès Marzal, Josep; Alcubilla González, Ramón (2004-11)
    Article
    Accés restringit per política de l'editorial
    We investigate different aspects of the absolute photonic band gap (PBG) formation in two-dimensional photonic structures consisting of rods covered with a thin dielectric film. Specifically, triangular and honeycomb ...
  • A two dimensional KTiOPO4 photonic crystal grown using a macroporous silicon template 

    Peña Revellez, Alexandra; Finizio, Sergio Di; Todorov Trifonov, Trifon; Carvajal, Joan Josep; Aguiló Díaz, Magdalena; Pallarès Marzal, Josep; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; Marsal Garví, Lluís Francesc; Diaz, Francesc; Martorell Pena, Jordi (2006-09)
    Article
    Accés restringit per política de l'editorial
    2D KTiOPO4 photonic crystals are fabricated using a silicon membrane of air holes as a template. Columns of KTiOPO4 are grown by liquid-phase epitaxy from a substrate into such air holes. The crystallographic orientation ...
  • Blackbody behaviour from spiked macroporous silicon photonic crystals 

    Vega Bru, Didac; Todorov Trifonov, Trifon; Hernández Díaz, David; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2011)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    Photonic Crystals (PhC) are structured materials, which show very attractive optical properties. In this report, we study and discuss the reflection and emission characteristics of a “black face” Macro-porous Silicon (MpSi) ...
  • Carbon Dioxide optical detection by macroporous silicon 

    Vega, Didac; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel (2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
  • Catalytic membrane reactors based on macroporous silicon for hydrogen production 

    Vega Bru, Didac; Hernández Díaz, David; López, E.; Jiménez, Nuria; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; Llorca Piqué, Jordi (2010)
    Text en actes de congrés
    Accés obert
    The typology of using hydrogen as an energy carrier and its implementation in portable fuel cells has motivated a considerable research interest in the development of new efficient hydrogen production technologies. Hydrogen ...
  • Characterization of 2D macroporous silicon photonic crystals: improving the photonic band identification in angular-dependent reflection spectroscopy in the mid-IR 

    Král, Z; Ferré Burrull, José; Pallarès Marzal, Josep; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; Marsal, L F (2008-02)
    Article
    Accés restringit per política de l'editorial
    We report the experimental characterization of two-dimensional (2D) macroporous silicon photonic crystals using angular-dependent reflectance spectroscopy in the mid-IR region. We have investigated different sample structures ...
  • Colloidal crystal wires 

    Tymczenko, M; Marsal, L E; Todorov Trifonov, Trifon; Rodriguez, Isabelle; Ramiro-Manzano, F; Pallares, J; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; Meseguer, F (2008-06-18)
    Article
    Accés restringit per política de l'editorial
    Several configurations of colloidal wires are obtained by infiltration of charge-stabilized polystyrene spheres into cylindrical pores of a silicon membrane (see figure). As channel dimensions are comparable to those of ...
  • Compact device for CO2 optical sensign using macroporous silicon photonic crystals 

    Vega, Didac; Rodríguez Martínez, Ángel; Calavia, Raül; Vilanova, Xavier; Todorov Trifonov, Trifon (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    A photonic crystal based on a macroporous silicon structure has been fabricated and successfully used for the detection of carbon dioxide. In this paper, the device and the measurement results are presented. The sensing ...
  • Compact device for CO2 optical sensing using macroporous silicon photonic crystals 

    Vega Bru, Didac; Rodríguez Martínez, Ángel; Todorov Trifonov, Trifon; Calavia, Raul; Vilanova, Xavier (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Text en actes de congrés
    Accés obert
    A photonic crystal based on a macroporous silicon structure has been fabricated and successfully used for the detection of carbon dioxide. In this paper, the device and the measurement results are presented. The sensing ...
  • Contact damage resistance of TiN-coated hardmetals: Beneficial effects associated with substrate grinding 

    Yang, Jing; García Marro, Fernando; Todorov Trifonov, Trifon; Oden, M; Johansson Joesaar, M.P; Llanes Pitarch, Luis Miguel (2015-08-15)
    Article
    Accés obert
    Contact loading is a common service condition for coated hardmetal tools and components. Substrate grinding represents a key step within the manufacturing chain of these coated systems. Within this context, the influence ...
  • CO removal at the nanoscale: A 1-cent gold prox reactor 

    Llorca Piqué, Jordi; Rosell, O.; Jiménez, Nuria; López, E.; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; González de Rivera, G.; Rodríguez, L.I.; Rodríguez, M.; Seco, M. (2010)
    Text en actes de congrés
    Accés restringit per decisió de l'autor
  • Development of microstructured zeolite films as highly accessible catalytic coatings for microreactors 

    Urbiztondo Castro, Miguel Ángel; Valera Cano, Enrique Andrés; Todorov Trifonov, Trifon; Alcubilla González, Ramón; Irusta Alderete, Silvia; Pina Isitia, María Pilar; Rodríguez Martínez, Ángel; Santamaria Ramiro, Jesus (2007-08-15)
    Article
    Accés restringit per política de l'editorial
    Regular structures of SiO2 microneedles and Si micromonoliths have been formed using processing methods similar to those used in the microelectronics field; then these structures have been used as supports for zeolite ...
  • Effects of symmetry reduction in two-dimensional square and triangular lattices 

    Todorov Trifonov, Trifon; Marsal, L F; Rodríguez Martínez, Ángel; Pallarès Marzal, Josep; Alcubilla González, Ramón (2004-06)
    Article
    Accés restringit per política de l'editorial
    We investigate the absolute photonic band gap (PBG) formation in two-dimensional (2-D) photonic crystals designed using symmetry reduction approach. The lattice symmetry, shape and orientation of dielectric scatterers ...
  • Emissive properties of SiO2 thin films through photonic windows 

    Hernández García, David; Garin Escriva, Moises; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2012-02)
    Article
    Accés obert
  • Enhanced geometries of macroporous silicon photonic crystals for optical gas sensing applications 

    Cardador Maza, David; Vega d'Aurelio, Davide; Segura García, Daniel; Todorov Trifonov, Trifon; Rodriguez, Albert (2017-07-01)
    Article
    Accés obert
    A macroporous silicon photonic crystal is designed and optimized theoretically for its use in gas sensing applications and IR optical filters. Light impinges perpendicularly onto the sample surface (vertical propagation) ...
  • Fabrication of silicon oxide microneedles from macroporous silicon 

    Rodríguez Martínez, Ángel; Molinero, D; Valera Cano, Enrique Andrés; Todorov Trifonov, Trifon; Marsal, L F; Pallarès Marzal, Josep; Alcubilla González, Ramón (2005-04)
    Article
    Accés restringit per política de l'editorial
    This paper presents a novel technique for silicon dioxide (SiO2) microneedle fabrication. Microneedles are hollow microcapillaries with tip diameters in the range of micrometers. They can be used in the fabrication of ...
  • Fabrication of two- and three-dimensional photonic crystals by electrochemical etching of silicon 

    Todorov Trifonov, Trifon; Marsal, L F; Rodríguez Martínez, Ángel; Pallarès Marzal, Josep; Alcubilla González, Ramón (2005-05)
    Article
    Accés restringit per política de l'editorial
    This paper reports on the fabrication of two-dimensional macropore arrays by electrochemical etching of silicon. We describe some critical effects accompanying the etching process that can generate imperfections in the ...
  • First use of macroporous silicon loaded with catalyst film for a chemical reaction: a microreformer for producing hydrogen from ethanol steam reforming 

    Llorca Piqué, Jordi; Casanovas Grau, Albert; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2008-04-25)
    Article
    Accés restringit per política de l'editorial
    Macroporous silicon with millions of parallel microchannels per square centimeter can be used as a micromonolithic support for high-speed catalysis in miniaturized systems, opening a new and exciting field of research and ...