Visualitza per paraule clau "nanostructures"

Ara mostrant els elements 1-16 d 16

    • openAccess   A novel ozone gas sensor based on one-dimensional (1D) α-Ag2WO4 nanostructures 

      Da Silva, Luis F.; Catto, Ariadne C.; Avansi, Waldir; Cavalcante, Laécio Santos; Andres, Juan; Aguir, Khalifa; Mastelaro, Valmor Roberto; Longo, Elson Royal Society of Chemistry (2014-01)
      This paper reports on a new ozone gas sensor based on α-Ag2WO4 nanorod-like structures. Electrical resistance measurements proved the efficiency of α-Ag2WO4 nanorods, which rendered good sensitivity even for a low ozone ...

    • openAccess   Biexcitons in CdSe nanoplatelets: geometry, binding energy and radiative rate 

      Macias-Pinilla, David F.; Planelles, Josep; Climente, Juan I. Royal Society of Chemistry (2022-05-13)
      Biexciton properties in semiconductor nanostructures are highly sensitive to quantum confinement, relative electron–hole masses, dielectric environment and Coulomb correlations. Here we present a variational Quantum Monte ...

    • openAccess   Diffusion-Recombination Impedance Model for Solar Cells with Disorder and Nonlinear Recombination 

      Bisquert, Juan; Mora-Sero, Ivan; Fabregat-Santiago, Francisco Wiley-VCH (2013-09-23)
      The diffusion–recombination model is a key tool in understanding the photovoltaic operation of solar cells. Dye-sensitized solar cells, organic solar cells, and inorganic semiconductor solar cells are systems affected by ...

    • closedAccess   Freezing Capture of Polymorphic Aggregates of Bolaamphiphilic L-Valine-Based Molecular Hydrogelators 

      Nebot Carda, Vicent J.; Diaz-Oltra, Santiago; Smets, Johan; Fernández Prieto, Susana; Miravet, Juan; Escuder, Beatriu WILEY-VCH Verlag GmbH & Co. KGaA (2014-05)
      Nanostructured xerogels have been prepared by the freeze-drying of hydrogels and aggregates formed by bolaamphiphilic l-valine derivatives after aging under different environmental conditions. A wide variety of shapes and ...

    • openAccess   From Complex Inorganic Oxides to Ag–Bi Nanoalloy: Synthesis by Femtosecond Laser Irradiation 

      Machado, Thales Rafael; Guerra Macedo, Nadia; Assis, Marcelo de; Doñate-Buendía, Carlos; Mínguez-Vega, Gladys; Teixeira, Mayara Mondego; Foggi, Camila Cristina; Vergani, Carlos; Beltrán Mir, Héctor; Andres, Juan; Cordoncillo, Eloisa; Longo, Elson American Chemical Society (2018-08-24)
      Bimetallic nanoalloys with a wide variety of structures and compositions have been fabricated through many diverse techniques. Generally, various steps and chemicals are involved in their fabrication. In this study, the ...

    • openAccess   Li2SnO3 branched nano- and microstructures with intense and broadband white-light emission 

      García-Tecedor, Miguel; Bartolomé, Javier; Maestre, David; Trampert, Achim; Cremades, Ana Springer Verlag (2019)
      Exploiting the synergy between microstructure, morphology and dimensions by suitable nanomaterial engineering, can effectively upgrade the physical properties and material performances. Li2SnO3 elongated nano- and ...

    • openAccess   Modulating the interaction between gold and TiO2 nanowires for enhanced solar driven photoelectrocatalytic hydrogen generation 

      Sudhagar, P.; Song, Taeseup; Devadoss, Anitha; Lee, Jung Woo; Haro, Marta; Terashima, Chiaki; Lysak, Volodymyr V.; Bisquert, Juan; Fujishima, Akira; Gimenez, Sixto; Paik, Ungyu Royal Society of Chemistry (2015)
      The interaction strength of Au nanoparticles with pristine and nitrogen doped TiO2 nanowire surfaces was analysed using density functional theory and their significance in enhancing the solar driven photoelectrocatalyti ...

    • openAccess   Morphology Diversity of L‐Phenylalanine‐Based Short Peptide Supramolecular Aggregates and Hydrogels 

      Martí-Centelles, Rosa; Escuder, Beatriu Wiley (2018-08)
      Supramolecular aggregates and hydrogels of diverse morphologies can be obtained by replacing the widely studied aromatic N‐capping of phenylalanine derivatives by long alkyl chains. Simple changes in chain length and number ...

    • openAccess   Nanoscale Perovskite‐Sensitized Solar Cell Revisited: Dye‐Cell or Perovskite‐Cell? 

      Yoo, So-Min; Lee, Seul-Yi; Velilla, Esteban; Kim, Myoung; Kim, Gitae; Shin, Taeho; Nazeeruddin, Mohammad Khaja; Mora-Sero, Ivan; Lee, Hyo Joong Wiley‐VCH Verlag (2020-03-20)
      A general and straightforward way of preparing few nanometer-sized well-separated MAPbIxBr3-x perovskite photosensitizers on the surface of ~1 μm thick mesoporous TiO2 photoanode was suggested via a two-step sequential ...

    • openAccess   Optomechanical Coupling Optimization in Engineered Nanocavities 

      Edelstein, Shulamit; Gomis-Bresco, Jordi; Arregui, Guillermo; Koval, P.; Lanzillotti Kimura, Norberto Daniel; Torrent, Daniel; Sotomayor Torres, Clivia M; García, Pedro David Wiley (2024)
      In optomechanics, the interaction between light and matter is enhanced by engineering cavities where the electromagnetic field and the mechanical displacement are confined simultaneously within the same volume. This leads ...

    • openAccess   Origin of photovoltage in perovskite solar cells probed by first-principles calculations 

      Echeverría-Arrondo, Carlos (2018-06-04)
      Hybrid halide perovskite solar cells hold great potential for photovoltaic applications, but suffer, however, from anomalous current density-voltage characteristics. With a view to further understanding the performance of ...

    • closedAccess   Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content 

      Deus, R.C.; Cortés, J.A.; Ramirez, M.A.; Ponce, Miguel Adolfo; Andres, Juan; Rocha, L.S.R.; Longo, Elson; Simões, Alexandre Elsevier (2015)
      The structural and photoluminescent properties at room temperature of CeO2 and La-doped CeO2 particles were undertaken. The obtained particles were synthesized by a microwave-assisted hydrothermal method (MAH) under different ...

    • closedAccess   Self-Assembling of Er2O3–TiO2 Mixed Oxide Nanoplatelets by a Template-Free Solvothermal Route 

      Julian-Lopez, Beatriz; Martos Macián, Mónica; Ulldemolins, Natalia; Odriozola, José A.; Cordoncillo, Eloisa; Escribano López, Purificación Wiley (2009)
      An easy solvothermal route has been developed to synthesize the first mesoporous Er2O3–TiO2 mixed oxide spherical particles composed of crystalline nanoplatelets, with high surface area and narrow pore size distribution. ...

    • closedAccess   Structural diversity in the self-assembly of pseudopeptidic macrocycles 

      Alfonso Rodríguez, Ignacio; Bru Roig, Miriam; Burguete, M. Isabel; Garcia-Verdugo, Eduardo; Luis, Santiago V. Wiley-VCH (2010)
      The self-assembling abilities of several pseudopeptidic macrocycles have been thoroughly studied both in the solid (SEM, TEM, FTIR) and in solution (NMR, UV, CD, FTIR) states. Detailed microscopy revealed large differences ...

    • openAccess   The role of counter-ions in crystal morphology, surface structure and photocatalytic activity of ZnO crystals grown onto a substrate 

      Catto, Ariadne C.; Ferrer, Mateus M.; Lopes, Osmando; Mastelaro, Valmor Roberto; Andres, Juan; Da Silva, Luis F.; Longo, Elson; Avansi, Waldir Elsevier (2020-11-01)
      In this contribution, we present an experimental and theoretical investigation of the role of counter-ions in the crystal morphology, surface structure, and photocatalytic activity of hierarchical ZnO nanostructures. The ...

    • closedAccess   Tuning Chelation by the Surfactant-Like Peptide A(6)H Using Predetermined pH 

      Castelletto, Valeria; Hamley, Ian W.; Segarra Maset, María Dolores; Berdugo Gumbau, Cristina; Miravet, Juan; Escuder, Beatriu; Seitsonen, J.; Ruokolainen, J. American Chemical Society (2014)
      We examine the self-assembly of a peptide A6H comprising a hexa-alanine sequence A6 with a histidine (H) “head group”, which chelates Zn2+ cations. We study the self-assembly of A6H and binding of Zn2+ ions in ZnCl2 ...