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    • 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 ...

    • Focused ion beam tomography of WC-Co cemented carbides 

      Jiménez Piqué, Emilio; Turón Viñas, Miquel; Chen, H.; Todorov Trifonov, Trifon; Fair, Jonathan; Tarrés, E.; Llanes, Angels (2017-09-01)
      Article
      Accés obert
      The microstructure of three different grades of WC-Co cemented carbides (hardmetals) has been reconstructed in three dimensions after sequential images obtained by focused ion beam. The three dimensional microstructual ...

    • High aspect ratio silicon dioxide pillars 

      Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Servera, F; Marsal, L F; Pallarès Marzal, Josep; Alcubilla González, Ramón (2005-06)
      Article
      Accés restringit per política de l'editorial
      This article describes the benefits of including cross-layer information in the scheduling mechanism of a UMTS downlink channel. In particular, the information obtained from the fast power control algorithm is used to ...

    • High yield hydrogen production enabled by macroporous silicon monoliths 

      Vega Bru, Didac; Jiménez Divins, Nuria; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Llorca Piqué, Jordi (Phantoms Foundation, 2023)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      A macroporous silicon (MPS) membrane of 210 µm thickness was functionalized and evaluated for hydrogen production by steam reforming of various fuels. Performance is comparable to conventional reactors, but in a much ...

    • Improving selective thermal emission properties of three-dimensional macroporous silicon through porosity tuning 

      Garin Escriva, Moises; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; Marquier, F.; Arnold, C.; Greffet, J.-J. (American Institute of Physics, 2008-08-27)
      Article
      Accés restringit per política de l'editorial
      We present a theoretical and experimental study on the effect of progressive porosity increase, through multiple oxidation/oxide removal steps, upon the optical characteristics in threedimensional macroporous silicon. ...

    • Infrared thermal emission in macroporous silicon three-dimensional photonic crystals 

      Garin Escriva, Moises; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2007-10)
      Article
      Accés obert
      In this paper we investigate the infrared thermal emission properties of macroporous silicon with modulated pore diameter. Samples with different pore modulation periodicities but fixed in-plane lattice constant are ...

    • Infrared thermal emission inmacroporous silicon three-dimensional photonics crystals 

      Garin Escriva, Moises; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (American Institute of Physics, 2007-07-30)
      Article
      Accés restringit per política de l'editorial
      In this paper we investigate the infrared thermal emission properties of macroporous silicon with modulated pore diameter. Samples with different pore modulation periodicities but fixed in-plane lattice constant are ...

    • Larger absolute photonic bandgap in two-dimensional air-silicon structures 

      Marsal, L F; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Pallarés, J; Alcubilla González, Ramón (2003-05)
      Article
      Accés restringit per política de l'editorial
      We investigate different aspects of the absolute photonic band gap (PBG) formation for two-dimensional photonic crystals, consisting of air rods drilled into silicon. Specifically, square lattices of square and circular ...

    • Macroporous silicon : a next generation catalytic monolith for ethanol steam reforming 

      Vega Bru, Didac; Hernández Díaz, David; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; López, E.; Jiménez, Nuria; Llorca Piqué, Jordi (Publicacions de la Universitat de València (PUV), 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Macroporous silicon membranes, consisting of straight parallel pores with a diameter of 3.3μm and depth/width ratio >60, are used as microreactors for high efficiency hydrogen generation via steam reforming of ethanol. The ...

    • Macroporous silicon for spectroscopic CO2 detection 

      Vega, Didac; Marti Alcaire, Ferran; Rodríguez Martínez, Ángel; Todorov Trifonov, Trifon (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
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      A carbon dioxide sensor based on a photonic crystal of macroporous silicon and measurements of its response are presented in this paper. Photonic crystals have opened new ways for the miniaturization of optical detector ...

    • Macroporous silicon membranes for hydrogen production from multiple fuel sources 

      Vega Bru, Didac; Jiménez Divins, Nuria; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Llorca Piqué, Jordi (Universitat de València, 2023)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      A macroporous silicon (MPS) membrane of 210 ¿m thickness was functionalized and evaluated for hydrogen production by steam reforming of various fuels. The MPS membrane was a regular array of pores about 3.3 ¿m diameter and ...

    • Macroporous silicon: a versatile material for 3D structure fabrication 

      Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Marsal, L F; Pallares, J; Alcubilla González, Ramón (2008-02)
      Article
      Accés restringit per política de l'editorial
      This work focuses on the fabrication of three-dimensional (3D) microstructures by electrochemical etching of n-type silicon. We exploit the possibility of modulating the pore diameter along the growing direction to produce ...

    • Mid-IR characterization of photonic bands in 2D photonic crystals on silicon 

      Kral, Z; Ferré Burrull, José; Todorov Trifonov, Trifon; Marsal, Lf; Rodríguez Martínez, Ángel; Pallares, J; Alcubilla González, Ramón (2008-09-30)
      Article
      Accés restringit per política de l'editorial
      We report the characterization of two-dimensional silicon photonic crystals using angular-dependent reflectivity in the mid-IR. The photonic crystals are obtained by electrochemical etching of an ordered array of holes ...

    • Negative Refraction Index in 3D MAcroporous Silicon Photonic Crystals 

      Vega Bru, Didac; Todorov Trifonov, Trifon; Hernández García, David; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2011)
      Text en actes de congrés
      Accés restringit per decisió de l'autor
      Photonic crystals (PhC) are sturctured materials, which show very attractive propieties, specially their optical behaviour and electromagnetic wave propagation. In this paper, we simulate a three-dimensional Photonic ...

    • New approaches for the fabrication of photonic structures of nonlinear optical materials 

      Carvajal, J J; Peña, A; Kumar, R.; Pujol, M. C.; Mateos, X.; Aguiló Díaz, Magdalena; Díaz, F; Vázquez De Aldana, J. R.; Méndez, Carlos Alberto; Moreno, P; Roso, L; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; Král, Z; Ferré Borrull, J.; Pallarès Marzal, Josep; Marsal, L F; Finizio, Sergio Di; Martorell Pena, Jordi; Macovez, Roberto (2009-12)
      Article
      Accés restringit per política de l'editorial
      We revisited two different strategies to fabricate 1D photonic crystals of nonlinear optical dielectric materials based on ultrafast laser ablation of the surface of an RbTiOPO4 crystal, and selective etching of ferroelectric ...

    • Optical properties of 3D macroporous silicon structures 

      Garin Escriva, Moises; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Marsal Garví, Lluís Francesc; Alcubilla González, Ramón (2008-04-15)
      Article
      Accés restringit per política de l'editorial
      We study the optical properties of three-dimensional (3D) microstructures fabricated by electrochemical etching of macroporous silicon with modulated pore diameter. Optical measurements along the pore axis reveal photonic ...

    • Polymer microfibers obtained using porous silicon templates 

      Marsal Garví, Lluís Francesc; Formentín, P.; Palacios, R.; Todorov Trifonov, Trifon; Ferré Burrull, José; Rodríguez Martínez, Ángel; Pallarès Marzal, Josep; Alcubilla González, Ramón (2008)
      Article
      Accés restringit per política de l'editorial
      The deposition of specific materials into ordered pores arranged in a regular lattice allows the fabrication of ordered fiber arrays. Porous silicon is an attractive candidate for use as a template because the porosity and ...

    • Semiconducting P3HT microstructures: fibres and tubes obtained from macroporous silicon template 

      Palacios, R; Formentin, P; Todorov Trifonov, Trifon; Estrada del Cueto, Magali; Alcubilla González, Ramón; Pallares, J; Marsal, L F (2008-10)
      Article
      Accés restringit per política de l'editorial
      Microtubes and microfibres composed of poly(3-hexylthiophene) (P3HT) were fabricated by melt-assisted templates using ordered macroporous silicon. We have studied the influence of the pore depth and the template type on ...

    • “Silicon millefeuille” : From a silicon wafer to multiple thin crystalline films in a single step 

      Hernández García, David; Todorov Trifonov, Trifon; Garin Escriva, Moises; Alcubilla González, Ramón (2013-04-29)
      Article
      Accés obert
      During the last years, many techniques have been developed to obtain thin crystalline films from commercial silicon ingots. Large market applications are foreseen in the photovoltaic field, where important cost reductions ...

    • Single-Step multiple-layers wafer slicing from macroporous silicon 

      Garin Escriva, Moises; Hernández García, David; Todorov Trifonov, Trifon; Cardador Maza, David; Alcubilla González, Ramón (2013)
      Text en actes de congrés
      Accés obert
      There is a rising interest, from both photovoltaics and microelectronics industry, in wafer thickness reduction. During the last decade, it has been steadily reduced from 350 µm to 180 µm, but benefits are foreseen for ...