Entity

Time filter

Source Type


Gelabert-Serra M.J.,Polytechnic University of Catalonia | Sumper A.,Polytechnic University of Catalonia | Sumper A.,University of Barcelona | Granados X.,Institute Of Ciencia Of Materials Of Barcelona Consejo Superior Of Investigaciones Cientificas | And 3 more authors.
IEEE Transactions on Applied Superconductivity | Year: 2011

The recent development, achieved on SC devices for grid applications, requires the support of design tools in order to establish the impact of these new devices on the operation of the electrical system. Classically, standard simulation programs are used in grid design and maintenance by the utilities; but these new devices require user written models, compatible with the grid simulators. In this paper, a user written model for the integration of superconducting cables in the grid, with the capacity to simulate dynamic behavior, is presented. Results of the simulations are presented which refer to the overall grid performance. © 2010 IEEE. Source


Roa J.J.,University of Poitiers | Jimenez-Pique E.,Universidad Politecnica de Ingenieria | Diaz J.,University of Barcelona | Morales M.,University of Barcelona | And 2 more authors.
Surface and Coatings Technology | Year: 2012

The early stages of aggressive degradation at 85% of humidity for 24h of single crystals of YBa 2Cu 3O 7-δ textured by Bridgman technique have been analyzed by means of atomic force microscopy, X-ray photoelectron spectroscopy, nanoindentation and focused ion beam. The results show that the initial formation of barium hydroxide and the non-superconducting green phase, Y 2BaCuO 5, induces the surface degradation and the loss of the mechanical properties as a consequence of the mechanical transformation after the degradation process due to an embrittlement of the superficial layer. © 2012 Elsevier B.V. Source


Punzi A.,University of Bari | Maiorano E.,University of Bari | Nicoletta F.,University of Catania | Blasi D.,Institute Of Ciencia Of Materials Of Barcelona Consejo Superior Of Investigaciones Cientificas | And 11 more authors.
European Journal of Organic Chemistry | Year: 2016

1,2,3-Triazole rings bearing hydrophobic aliphatic or hydrophilic oligoether chains were easily introduced at the two ends of the conjugated skeleton of bisthiophene-diketopyrrolopyrrole (TDPP) derivatives by simple click cycloaddition reactions. The combination of side chains with different structures and polarities on the triazole rings with the side chains on the N-atoms of the lactam groups of the TDPP moiety enabled the solubility and the solid-state spectroscopic properties of the resulting conjugated molecules to be tuned. Formation of nanostructured aggregates and dependence of their spectroscopic behavior on the substitution pattern were investigated. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source


Calleja A.,Institute Of Ciencia Of Materials Of Barcelona Consejo Superior Of Investigaciones Cientificas | Ricart S.,Institute Of Ciencia Of Materials Of Barcelona Consejo Superior Of Investigaciones Cientificas | Granados X.,Institute Of Ciencia Of Materials Of Barcelona Consejo Superior Of Investigaciones Cientificas | Palmer X.,Institute Of Ciencia Of Materials Of Barcelona Consejo Superior Of Investigaciones Cientificas | And 5 more authors.
CrystEngComm | Year: 2012

Electrospinning was used to produce fibers of barium zirconate (BZO) by metalorganic decomposition. Using short deposition times, a low density of randomly distributed fibers were deposited on lanthanum aluminate single crystals with (100) orientation. Then the films were subjected to thermal treatment at 600 °C and 800 °C to decompose the organic matter and crystallize the perovskite phase. X-ray diffraction, field-emission electron and atomic force microscopies were used as characterization tools. Continuous BZO tracks are obtained after removal of organics at 600 °C. At 800 °C, cube-on-cube heteroepitaxy of barium zirconate with respect to the lanthanum aluminate template was detected by synchrotron X-ray diffraction, although a fraction of misoriented BaZrO 3 crystals were also detected by grazing incidence X-ray diffraction (GIXRD). For precursor fibers closely attached to the single crystal surface, BaZrO 3 grows as epitaxial nanoparticles, which then coarsen and self-organize along the fiber tracks, showing oscillations in the interparticle separation distance. Growth of the coarsened low-aspect ratio crystals follows an anisotropic atomic diffusion mechanism, in which mass transport mainly occurs in the direction of the initially deposited fiber. The misoriented nanoparticles observed by GIXRD are attributed to the fibers deposited on top of those arriving first to the substrate and to the loss of the interfacial epitaxial growth at large crystal thickness. The distribution and morphology of the particles have been further analyzed by means of atomic force microscopy. © The Royal Society of Chemistry 2012. Source


Malowney J.,Institute Of Ciencia Of Materials Of Barcelona Consejo Superior Of Investigaciones Cientificas | Malowney J.,Institute Of Microelectronica Of Barcelona Consejo Superior Of Investigaciones Cientificas | Mestres N.,Institute Of Ciencia Of Materials Of Barcelona Consejo Superior Of Investigaciones Cientificas | Borrise X.,Institute Of Microelectronica Of Barcelona Consejo Superior Of Investigaciones Cientificas | And 9 more authors.
Microelectronic Engineering | Year: 2013

Ordered arrays of crystalline complex oxides nanostructures are synthesized onto single crystal insulating substrates using a polyvinyl alcohol based electron beam resist precursor. The irradiated zones are insoluble in water (negative-tone resist) due to the electron induced cross linking. The high temperature treatment of the developed precursor samples leads to the formation of ordered arrays of nanodots for low irradiation doses and to the growth of epitaxially oriented nanowires for high irradiation dosages. A local characterization of the generated pattern is performed by atomic force microscopy and high resolution TEM. © 2013 Elsevier B.V. All rights reserved. Source

Discover hidden collaborations