Browsing by Author "Vega Bru, Didac"Més informació

Now showing items 1-20 of 21

    • Blackbody behaviour from spiked macroporous silicon photonic crystals 

      Vega Bru, Didac; Todorov Trifonov, Trifon; Hernández Díaz, David; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2011)
      Conference lecture
      Restricted access - publisher's policy
      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) ...

    • 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)
      Conference report
      Open Access
      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 ...

    • 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)
      Conference report
      Open Access
      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 ...

    • Development and impedimetric evaluation of a magnetic interdigitated microelectrode 

      Sánchez Terrones, Benjamin; Vega Bru, Didac; Rodríguez Martínez, Ángel; Bragós Bardia, Ramon; Marco Colas, María Pilar; Valera Cano, Enrique Andrés (2014-11-01)
      Article
      Restricted access - publisher's policy
      A magnetic interdigitated microelectrode (m-ID mu E) has been developed, characterized and evaluated. In order to demonstrate the potential use of these electrodes in the biosensors field, impedimetric measurements of ...

    • Development of gas sensors based in photonic cristal slabs 

      Yoosefi, Oraman; Yahyapour, MJ; Segura García, Daniel; Vega Bru, Didac; Dios Otín, Víctor Federico; Rodríguez Martínez, Ángel (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      This work describes an innovative application of structures of photonic crystal slabs for gas sensors. Structures consisting in double ring have been studied by simulation. Their working mechanism is based in the effect ...

    • Impact of the absorption in transmittance and reflectance on macroporous silicon photonic crystals 

      Cardador Maza, David; Vega Bru, Didac; Rodríguez Martínez, Ángel (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Conference report
      Open Access
      The characteristics of reflection and transmission peaks in the spectra of photonic crystals have been studied theoretically and the results compared to measurements performed in fabricated samples. The aim of this work ...

    • Improved transmission and thermal emission in macroporous silicon photonic crystals with 700 NM pitch 

      Cardador Maza, David; Vega Bru, Didac; Segura García, Daniel; Rodríguez Martínez, Ángel (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference lecture
      Open Access

    • 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)
      Conference report
      Restricted access - publisher's policy
      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
      Open Access
      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 for gas detection 

      Vega Bru, Didac; Rodríguez Martínez, Ángel (2018-11-14)
      Part of book or chapter of book
      Open Access
      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; Martin, Ferran; Pavón Urbano, Ramón; Rodríguez Martínez, Ángel (2014-09-05)
      Article
      Open Access
      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 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)
      Conference lecture
      Open Access

    • Macroporous silicon. Technology and applications 

      Vega Bru, Didac; Rodríguez Martínez, Ángel (InTech - Open science/Open minds, 2017-06)
      Part of book or chapter of book
      Open Access
      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 ...

    • 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)
      Conference report
      Restricted access - author's decision
      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 ...

    • 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
      Restricted access - publisher's policy
      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 ...

    • Simulation and analysis of photonic structures in macroporous silicon 

      Vega Bru, Didac (Universitat Politècnica de Catalunya, 2009-07-13)
      Master thesis (pre-Bologna period)
      Open Access
      This Master Thesis is dedicated to photonic crystal, in particular to macroporous silicon. We introduce the concepts of crystallography, and symmetry, and important associated tools to its study, the Reciprocal lattice, ...

    • Study of resonant modes in a 700 nm pitch macroporous silicon photonic crystal 

      Cardador Maza, David; Vega Bru, Didac; Segura García, Daniel; Rodríguez Martínez, Ángel (2017-01-01)
      Article
      Open Access
      In this study the modes produced by a defect inserted in a macroporous silicon (MP) photonic crystal (PC) have been studied theoretical and experimentally. In particular, the transmitted and reflected spectra have been ...

    • The effect of absorption losses on the optical behaviour of macroporous silicon photonic crystal selective filters 

      Vega Bru, Didac; Cardador Maza, David; Todorov Trifonov, Trifon; Garin Escriva, Moises; Rodríguez Martínez, Ángel (2016-02-15)
      Article
      Open Access
      The effect of losses in photonic crystal structures on transmittance and reflectance has been studied by numerical techniques, and compared to fabricated macroporous silicon samples. Material absorption and tolerances of ...

    • Transmission and thermal emission in the NO2 and CO absorption lines using macroporous silicon photonic crystals with 700 Nm pitch 

      Cardador Maza, David; Segura García, Daniel; Vega Bru, Didac; Rodríguez Martínez, Ángel (Scitepress, 2017)
      Conference lecture
      Open Access

    • Tuning the emissivity of 3D macroporous silicon in the mid-infrared 

      Hernández Díaz, David; Vega Bru, Didac; Garin Escriva, Moises; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón (2010)
      Conference report
      Open Access
      Tailoring the thermal emission of a particular material by using periodic micro-structures has attracted great interest for its potential applications in heating and lighting systems or thermophotovoltaics. […] Metallic ...