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Mostrando ítems 167-186 de 501

    • openAccess   Fabrication of gold nanoparticles in Therminol VP-1 by laser ablation and fragmentation with fs pulses 

      Torres-Mendieta, Rafael; Mondragon, Rosa; Juliá Bolívar, José Enrique; Mendoza-Yero, Omel; Cordoncillo, Eloisa; Lancis, Jesús; Mínguez-Vega, Gladys IOP Science (2014-10-22)
      This letter reports on a physical method to produce highly pure, size-controlled and well-dispersed spherical gold nanoparticles (NPs) in Therminol VP-1 by pulsed laser ablation in liquids (PLAL) using a 30 fs Ti:Sapphire ...

    • openAccess   Fabrication of high stable gold nanofluid by pulsed laser ablation in liquids 

      Torres-Mendieta, Rafael; Mondragon, Rosa; Juliá Bolívar, José Enrique; Mendoza-Yero, Omel; Lancis, Jesús; Mínguez-Vega, Gladys Copyright © 2015 VBRI Press (2015-11)
      Laser ablation in liquids by femtosecond radiation has been used to generate gold nanoparticles in a heat transfer fluid to produce a high stable thermal nanofluid as a heat transfer intensification technique. In oil based ...

    • openAccess   Facile kinetics of Li-ion intake causes superior rate capability in multiwalled carbon nanotube@TiO2 nanocomposite battery anodes 

      Acevedo Peña, Próspero; Haro, Marta; Rincón, M. E.; Bisquert, Juan; Garcia-Belmonte, Germà Elsevier (2014-12)
      Nanotechnology produces hybrids with superior properties than its individual constituents. Here MWCNT@TiO2 composites have been synthesized by controlled hydrolysis of titanium isopropoxide over MWCNT, to be incorporated ...

    • openAccess   Fast and low temperature growth of electron transport layers for efficient perovskite solar cells 

      Zhang, Jie; Juarez-Perez, Emilio J.; Mora-Sero, Ivan; Viana, Bruno; Pauporté, Thierry Royal Society of Chemistry (2015-01)
      We describe a fast, simple and low temperature electrochemical technique for the preparation of zinc oxide layers on rigid and flexible substrates. The layers, prepared from a zinc nitrate precursor, are of high structural ...

    • openAccess   Fast compressive Raman bio-imaging via matrix completion 

      Soldevila, Fernando; Dong, Jonathan; Tajahuerce, Enrique; Gigan, Sylvain; Barbosa de Aguiar, Hilton Optical Society of America (2019)
      Raman microscopy is a powerful method combining non-invasiveness with no special sample preparation. Because of this remarkable simplicity, it has been widely exploited in many fields, ranging from life and materials ...

    • openAccess   Fast synthesis of micro/mesoporous xerogels: Textural and energetic assessment 

      Isaacs Páez, Elisabeth; Haro, Marta; Juarez-Perez, Emilio J.; Jiménez Carmona, Rocío; Parra Soto, José Bernardo; Leyva Ramos, Roberto; Ovín Ania, María Concepción Elsevier (2015)
      The sol–gel polymerization of resorcinol/formaldehyde mixtures to obtain porous gels is typically a long process performed throughout several days. In this work, we have explored an experimental approach to reduce the time ...

    • openAccess   Femtosecond laser settings for optimal bracket bonding to zirconia 

      García-Sanz, Verónica; Paredes-Gallardo, Vanessa; Bellot-Arcís, Carlos; Martínez-León, Lluís; Torres-Mendieta, Rafael; Montero, Javier; Albadalejo, Alberto Springer Verlag (2018)
      Bonding orthodontic brackets to ceramic materials is a challenging procedure; femtosecond (FS) laser conditioning could provide improved results, but the ideal settings for effective bracket-zirconia bonding have never ...

    • openAccess   Femtosecond-laser-irradiation-induced structural organization and crystallinity of Bi2WO6 

      Pinatti, Ivo M; Gouveia, Amanda; Doñate-Buendía, Carlos; Mínguez-Vega, Gladys; Longo, Elson Nature Research (2020)
      Controlling the structural organization and crystallinity of functional oxides is key to enhancing their performance in technological applications. In this work, we report a strong enhancement of the structural organization ...

    • openAccess   Fiber transmission and generation of ultrawideband pulses by direct current modulation of semiconductor lasers and chirp-to-intensity conversion 

      Torres Company, Víctor; Prince, Kamau; Tafur Minroy, Idelfonso Optical Society of America (2008-02-01)
      Optical pulses generated by current modulation of semiconductor lasers are strongly frequency chirped. This effect has been considered pernicious for optical communications. We take advantage of this effect for the generation ...

    • openAccess   First Experimental Evidence of Amorphous Tin Oxide Formation in Lead-Free Perovskites by Spectroscopic Ellipsometry 

      Mannino, Giovanni; Sanchez-Diaz, Jesus; Smecca, Emanuele; Valastro, Salvatore; Deretzis, Ioannis; S. Sánchez, Rafael; MARTINEZ PASTOR, JUAN CARLOS; Mora-Sero, Ivan; ALBERTI, ALESSANDRA Wiley (2023)
      The most promising lead-free options for producing perovskite solar cells are tin halide perovskite materials. Herein, while in situ monitoring the optical evolution of the material in humid air, spectroscopic ellipsometry ...

    • openAccess   First-passage-time analysis of atomic-resolution simulations of the ionic transport in a bacterial porin 

      Calero, Carles; Faraudo, Jordi; Aguilella-Arzo, Marcel American Physical Society (2011-02-16)
      We have studied the dynamics of chloride and potassium ions in the interior of the Outer membrane porin F (OmpF) under the influence of an external electric field. From the results of extensive all-atom molecular dynamics ...

    • openAccess   Fluctuation-Driven Transport in Biological Nanopores. A 3D Poisson–Nernst–Planck Study 

      Aguilella-Arzo, Marcel; Queralt-Martín, María; López, María Lidón; Alcaraz, Antonio MDPI (2017)
      Living systems display a variety of situations in which non-equilibrium fluctuations couple to certain protein functions yielding astonishing results. Here we study the bacterial channel OmpF under conditions similar to ...

    • openAccess   Formation Criteria of High Efficiency Perovskite Solar Cells in Ambient Conditions 

      Aranda Alonso, Clara; Cristobal, Cesar; Shooshtari, Leyla; Li, Cheng; Huettner, Sven; Guerrero, Antonio Royal Society of Chemistry (2017)
      The field of lead halide perovskites for solar cell applications has recently reported impressive power conversion (PCE) above 22 % using complex mixed cation formulations. Very importantly, highest PCE have been obtained ...

    • openAccess   Fractal generalized zone plates 

      Mendoza-Yero, Omel; Fernández Alonso, Mercedes; Mínguez-Vega, Gladys; Lancis, Jesús; Climent, Vicent; Monsoriu, Juan A. Optical Society of America (2009)
      The construction of fractal generalized zone plates (FraGZPs) from a set of periodic diffractive optical elements with circular symmetry is proposed. This allows us to increase the number of foci of a conventional fractal ...

    • openAccess   Fresnel phase retrieval method using an annular lens array on an SLM 

      Loriot, Vincent; Mendoza-Yero, Omel; Pérez Vizcaíno, Jorge; Mínguez-Vega, Gladys; De Nalda, R.; Bañares, Luis; Lancis, Jesús Springer (2014-10)
      Wavefront aberrations play a major role when focusing an ultrashort laser pulse to a high-quality focal spot. Here, we report a novel method to measure and correct wavefront aberrations of a 30-fs pulsed laser beam. The ...

    • openAccess   From Flat to Nanostructured Photovoltaics: Balance between Thickness of the Absorber and Charge Screening in Sensitized Solar Cells 

      Fabregat-Santiago, Francisco; Bisquert, Juan; Mora-Sero, Ivan; Boix, Pablo P; Yong, Hui Lee; Sang, Hyuk Im; Sang, Il Seok American Chemical Society (2012-01)
      Nanoporous metal oxide electrodes provide a high internal area for dye anchoring in dye-sensitized solar cells, but the thickness required to extinguish the solar photons also enhances recombination at the TiO2/electrolyte ...

    • openAccess   From Frequency Domain to Time Transient Methods for Halide Perovskite Solar Cells: The Connections of IMPS, IMVS, TPC, and TPV 

      Bisquert, Juan; Janssen, Mathijs American Chemical Society (2021-08-26)
      The correlation of different methods of measurement can become an important tool to identify the dominant physical elements that govern the electronic and ionic dynamics in perovskite solar cells. The diverse phenomena ...

    • closedAccess   From Salts to Ionic Liquids by Systematic Structural Modifications: A Rational Approach Towards the Efficient Modular Synthesis of Enantiopure Imidazolium Salts 

      Ríos-Lombardía, Nicolás; Busto, Eduardo; Gotor Fernández, Vicente; Porcar Garcia, Raul; Garcia-Verdugo, Eduardo; Luis, Santiago V.; Alfonso Rodríguez, Ignacio; Garcia-Granda, Santiago; Menéndez Velázquez, Amador Wiley-VCH (2010)
      This paper reports a simple and robust modular synthetic strategy that leads to a large variety of configurationally and structurally diverse imidazole-based chiral ionic liquids (CILs) by lipase-catalyzed resolution. The ...

    • openAccess   Fullerene-Based Materials as Hole-Transporting/Electron Blocking Layers. Applications in Perovskite Solar Cells 

      Völker, Sebastian F.; Vallés Pelarda, Marta; Pascual, Jorge; Collavini, Silvia; Ruipérez, F.; Zuccatti, Elisabetta; Hueso, Luis E.; Tena-Zaera, Ramón; Mora-Sero, Ivan; Delgado, Juan Luis Wiley (2018)
      Here we report for the first time an efficient fullerenebased compound, FU7, able to act as Hole-Transporting Material (HTM) and electron blocking contact. It has been applied on perovskite solar cells (PSCs), obtaining ...

    • closedAccess   General Working Principles of CH3NH3PbX3 Perovskite Solar Cells 

      González Pedro, Victoria; Juarez-Perez, Emilio J.; Arsyad, Waode Sukmawati; Barea, Eva M; Fabregat-Santiago, Francisco; Mora-Sero, Ivan; Bisquert, Juan American Chemical Society (2014)
      Organometal halide perovskite-based solar cells have recently realized large conversion efficiency over 15% showing great promise for a new large scale cost-competitive photovoltaic technology. Using impedance spectroscopy ...