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Ara es mostren els items 46-65 de 79

    • 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)
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      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 coated with M/TiO2 (M=Au,Pt) as a highly efficient photoreactor for hydrogen production 

      Serafin, Jaroslaw; Soler Turu, Lluís; Vega Bru, Didac; Rodríguez Martínez, Ángel; Llorca Piqué, Jordi (2020-03-07)
      Article
      Accés obert
      Macroporous silicon disks containing ordered channels of 2 µm side and 0.2 mm length (9 × 106 channels cm-2) have been functionalized with a thin layer of Au/TiO2 and Pt/TiO2 photocatalysts and tested in the photoproduction ...

    • Macroporous silicon FET transistors for power applications 

      Vega, Didac; Najar, R.; Pina, Maria; Rodríguez Martínez, Ángel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
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      In this paper we propose the use of macroporous silicon for microelectronic devices. We propose and study four different FET transistor structures using macroporous silicon as base material. Macroporous silicon is a ...

    • Macroporous silicon filters, a versatile platform for NDIR spectroscopic gas sensing in the MIR 

      Cardador Maza, David; Segura García, Daniel; Deriziotis, Ioannis; Rodríguez Martínez, Ángel; Llorca Piqué, Jordi (2019-07-23)
      Article
      Accés obert
      This paper describes the spectroscopic detection of gases using macroporous silicon photonic crystals as narrow filters. The study begins by demonstrating the feasibility of photoelectrochemical etching to fabricate narrow ...

    • Macroporous silicon for gas detection 

      Vega Bru, Didac; Rodríguez Martínez, Ángel (2018-11-14)
      Capítol de llibre
      Accés obert
      Macroporous silicon (MPS) has been shown to be a promising material in many areas of technical interest. In particular, MPS has been applied for electronic devices and microfluidic applications. One of the most promising ...

    • Macroporous silicon for high-capacitance devices using metal electrodes 

      Vega Bru, Didac; Reina Marsinyach, Jordi; Zapata Rodríguez, Mireya; Pavón Urbano, Ramón; Rodríguez Martínez, Ángel (Universitat de València, 2014)
      Comunicació de congrés
      Accés obert

    • Macroporous silicon for high-capacitance devices using metal electrodes 

      Vega Bru, Didac; Reina Marsinyach, Jordi; Martin, Ferran; Pavón Urbano, Ramón; Rodríguez Martínez, Ángel (2014-09-05)
      Article
      Accés obert
      In this paper, high-capacity energy storage devices based on macroporous silicon are demonstrated. Small footprint devices with large specific capacitances up to 100 nF/mm(2), and an absolute capacitance above 15 mu F, ...

    • 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)
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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 microreactor for the preferential oxidation of CO 

      Divins, N.J.; López, E.; Llorca, J.; Vega, Didac; Rodríguez Martínez, Ángel; González de Rivera, F.; Angurell, I.; Seco, M.; Rossell, O. (Institute of Electrical and Electronics Engineers (IEEE), 2013)
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      A macroporous silicon micromonolith containing ca. 40,000 regular channels of 3.3 μm in diameter per square millimeter has been successfully functionalized with an Au/TiO2 catalyst for CO preferential oxidation (CO-PrOx) ...

    • Macroporous silicon photonic crystals for gas sensing 

      Vega, Didac; Reina, Jordi; Rodríguez Martínez, Ángel (Institute of Electrical and Electronics Engineers (IEEE), 2013)
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      In this paper we study a compact gas sensor based on a photonic crystal built from macroporous silicon. Its sensing mechanism is based in the absorption of infrared light by a gas. Photonic crystals are structured materials ...

    • Macroporous silicon structures in 700 nm and 500 nm 

      Rodríguez Martínez, Ángel; Vega Bru, Didac; Llorca Piqué, Jordi (Editora ARTEMIS, 2023)
      Capítol de llibre
      Accés obert
      Macroporous Silicon is a structured material with which innovative optical and electrical characteristics can be obtained. It consists in a crystalline silicon slab where tubular perforations are made. Several fabrication ...

    • Macroporous silicon. Technology and applications 

      Vega Bru, Didac; Rodríguez Martínez, Ángel (InTech - Open science/Open minds, 2017-06)
      Capítol de llibre
      Accés obert
      The knowledge of fundamental silicon questions and all aspects of silicon technology gives the possibility of improvement to both initial silicon material and devices on silicon basis. The articles for this book have been ...

    • 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 ...

    • Macroporous silicon: efficient antireflective layer on crystalline silicon 

      Fonthal Rico, Faruk; Torres, Ivaldo; Rodríguez Martínez, Ángel (2011-07)
      Article
      Accés restringit per política de l'editorial
      A macroporous silicon layer (ma-PS) electrochemically grown on crystalline silicon surface can be used as an efficient antireflective layer in optical devices as antireflection coating. In this work, we presented the ma-PS ...

    • 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)
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      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 ...

    • Novel Electronic Devices in Macroporous Silicon: Design of FET Transistors for Power Applications 

      Rodríguez Martínez, Ángel; Vega Bru, Didac; Najar, R.; Pina, M. (2011-07)
      Article
      Accés restringit per política de l'editorial
      In this paper, we study the application of macroporous silicon (MpSi) to the fabrication of transistors: Four different FET transistor structures are proposed using MpSi as the base material. These devices have been studied ...

    • 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 ...