Now showing items 1-20 of 54

  • A Combined Clinical and Langmuir Film Study of Natural Tear Films 

    Guaus Guerrero, Ester; Fàbregas, Carla; Pérez, Miriam; Torrent Burgués, Juan (2017-03-09)
    Article
    Open Access
    The Langmuir technique has been applied to the study of natural tears and the results obtained from surface pressure-area isotherms have been correlated with those of clinical tests (the Schirmer and the TFBUT tests). The ...
  • A nanoscale study of dissolution and growth processes in cement hydrates 

    Rheinheimer, Vanessa (Universitat Politècnica de Catalunya, 2012-11-30)
    Doctoral thesis
    Open Access
    This thesis aims at providing new knowledge on the, otherwise poorly known, molecular-scale mechanisms that operate during hydration of cement phases and dissolution of their hydrates. In order to pursue this objective, a ...
  • An X-ray photoelectron spectroscopy study of the hydration of C2S thin films 

    Rheinheimer, Vanessa; Casanova Hormaechea, Ignasi (2014-06)
    Article
    Restricted access - publisher's policy
    Electron-beam evaporation was used to produce thin films of ß-dicalcium silicate. Chemical and mineralogical compositions were characterized by X-ray photoelectron spectroscopy (XPS) and grazing-angle X-ray diffraction ...
  • BiFeO3 films on steel substrate prepared by the polymerized complex method 

    Popa, Mónica Mihaela; Preda, Silviu; Fruth, Victor; Sedlácková, Katarina; Balázsi, Csaba; Crespo Artiaga, Daniel; Calderón Moreno, José María (2007-07)
    Conference report
    Open Access
    Es presenta un mètode de producció de capes primes de $ BiFeO_3 $ per síntesi en fase líquida a baixa temperatura
  • Capacitive tunnels in single-walled carbon nanotube networks on flexible substrate 

    Iqbal, M. Zahir; Iqbal, Waheed; Eom, J.; Ahmad, M.; Ferrer Anglada, Núria (American Institute of Physics (AIP), 2012-03-15)
    Article
    Open Access
    We report the analysis of single-walled carbon nanotube networks, which are expected to be suitable as miniaturized flexible radio frequency RC filters and also have important implications for high frequency devices. The ...
  • Compositional influence on the electrical performance of zinc indium tin oxide transparent thin-film transistors 

    Marsal Vinade, Albert; Carreras Seguí, Paz; Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal; Galindo Lorente, Sergi; Alcubilla González, Ramón; Bertomeu Balaguero, Joan; Antony, Aldrin (2014-03-31)
    Article
    Restricted access - publisher's policy
    In this work, zinc indium tin oxide layers with different compositions are used as the active layer of thin film transistors. This multicomponent transparent conductive oxide is gaining great interest due to its reduced ...
  • Construction of free-standing films using graphene for biomedical applications 

    Biurrun Zuasti, Maialen (Universitat Politècnica de Catalunya / Zhejiang University, 2011)
    Master thesis
    Restricted access - author's decision
    The LbL Electrostatic Self Assembly could be used to produce nano or micrometric thickness multilayer films with several different functionalities and applications. It is based on the alternative dipping of a substrate in ...
  • Contact Fatigue Behavior of PVD-Coated Steel 

    Ramírez, Giselle; Tarres, Elena; Casas Aguirregomezcorta, Begoña; Valls, Isaac; Martínez Martínez, María del Rosario; Llanes Pitarch, Luis Miguel (2009)
    Article
    Restricted access - publisher's policy
    In this study, the contact fatigue behavior of a PVD TiN coating deposited onto DIN 1.2379 coldwork tool steel is assessed by cyclic spherical indentation. Experimental characterization focuses on the evaluation of ...
  • Crystalline Silicon surface passivation with amorphous SiCx:H films deposited by Plasma- Enhanced Chemical Vapor Deposition 

    Martín García, Isidro; Vetter, Michael; Garin Escriva, Moises; Orpella García, Alberto; Voz Sánchez, Cristóbal; Puigdollers i González, Joaquim; Alcubilla González, Ramón (American Institute of Physics (AIP), 2005-12)
    Article
    Restricted access - publisher's policy
    Surface-passivating properties of hydrogenated amorphous silicon carbide films(a-SiCx:H)(a-SiCx:H)deposited by plasma-enhanced chemical-vapor deposition on both pp- and nn-type crystalline silicon(c-Si)(c-Si) have been ...
  • Ductile tearing of polymer films 

    Delgado Rangel, José Alejandro (Universitat Politècnica de Catalunya, 2009-09)
    Master thesis
    Restricted access - author's decision
  • Effect of specimen notch quality on the essential work of fracture of ductile polymer films 

    Martínez Benasat, Antonio; León, Noel; Segovia, Angélica; Cailloux, Jonathan; Martínez, Paris (2017-06-07)
    Article
    Open Access
    The essential work of fracture approach has been employed to analyse the effect of notch sharpening on the fracture toughness of a semicrystalline multiphase ethylene-propylene block copolymer. Double edge notched tension ...
  • Electronic transport in low temperature nanocrystalline silicon thin-film transistors obtained by hot-wire CVD 

    Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal; Orpella García, Alberto; Martín García, Isidro; Soler Vilamitjana, David; Fonrodona, Marta; Bertomeu Balaguero, Joan; Andreu Batallé, Jordi; Alcubilla González, Ramón (2002-04)
    Article
    Restricted access - publisher's policy
    Hydrogenated nanocrystalline silicon (nc-Si:H) obtained by hot-wire chemical vapour deposition (HWCVD) at low substrate temperature (150 °C) has been incorporated as the active layer in bottom-gate thin-film transistors ...
  • Epitaxial BaZrO3 tracks by electrospinning of metalorganic fibers on single crystals 

    Obradors i Berenguer, Francesc Xavier; Calleja Lázaro, Albert; Ricart Miró, Susagna; Granados García, Javier A.J.; Palmer Paricio, Xavier; Solano Reina, Enrique; Tornero García, José Antonio; Cano Casas, Francesc; Puig Molina, Teresa (2012-07-21)
    Article
    Restricted access - publisher's policy
  • Experimental observation of oxygen-related defect state in pentacene thin films 

    Nadaždy, Vojtech; Durný, Rudolf; Puigdollers i González, Joaquim; Voz Sánchez, Cristóbal; Cheylan, Stephanie; Gmucová, K. (American Institute of Physics, 2007-02-28)
    Article
    Restricted access - publisher's policy
    The authors report on a metastable defect observed in pentacene thin films. The defect, which is characterized by a hole trap at Ev+0.6 eV and attempt-to-escape frequency of 5x1012 s−1, can be reversibly created/removed ...
  • Fabrication and surface modification of PLLA films for cardiovascular applications 

    Norroy, Joe (Universitat Politècnica de Catalunya, 2014-02)
    Master thesis (pre-Bologna period)
    Open Access
    Cardiovascular diseases have emerged as a major concern since they are the first cause of death in developed countries. The advent of percutaneous trans luminal coronary angioplasty consisted in an alternative to invasive ...
  • Front contact optimization of industrial scale CIGS solar cells for low solar concentration using 2D physical modeling 

    Delgado Sánchez, José María; López González, Juan Miguel; Orpella García, Alberto; Sánchez-Cortezón, Emilio; Alba, Maria D.; López López, Carmen; Alcubilla González, Ramón (2017-02-01)
    Article
    Open Access
    Cu(In,Ga)Se2 (CIGS) technology is one of the best absorber materials with record efficiencies among photovoltaic thin-film technologies (22.3% at lab scale and 16% at large commercial module). Although research on this ...
  • Generació amb condicions estàtiques i dinàmiques de films de polímers conductors. Efecte en la electroactivitat i morfologia superficial 

    Sánchez i Jiménez, Margarita (Universitat Politècnica de Catalunya, 2012-06)
    Master thesis
    Restricted access - author's decision
    Poli(3,4-etilendioxitiofè) (PEDOT) i poli(N-metilpirrol) (PNMPy) homopolímers i sistemes tricapa formats per capes alternes d'aquests dos polímers conductors han estat sintetitzats electroquímicament per oxidació anòdica ...
  • Growth and physical properties of highly oriented La-doped (K,Na)NbO3 ferroelectric thin films 

    Vendrell Villafruela, Xavier; Raymond, Oscar; Ochoa Guerrero, Diego A.; García García, José Eduardo; Mestres, Lourdes (2015-02-27)
    Article
    Open Access
    Lead-free (K,Na)NbO3 (KNN) and La doped (K,Na)NbO3 (KNN-La) thin films are grown on SrTiO3 substrates using the chemical solution deposition method. The effect of adding different amounts of Na and K excess (0-20 mol%) is ...
  • High dielectric constant donors and acceptors for organic photovoltaics 

    Vázquez Fernández, Naiara Ilía (Universitat Politècnica de Catalunya / Rijksuniversiteit Groningen, 2013)
    Bachelor thesis
    Restricted access - author's decision
    Organic solar cells bear the potential to develop a long-term technology that is environmentally clean and economically promising for large-scale power generation. Thanks to higher absorption coefficient, organic materials ...
  • High hardness, low Young's modulus and low friction of nanocrystalline ZrW2 Laves phase and Zr1-xWx thin films 

    Horwat, David; Jiménez Piqué, Emilio; Pierson, J.F.; Migot, A.; Dehmas, M.; Anglada Gomila, Marcos Juan (2012-04)
    Article
    Restricted access - publisher's policy
    Zr1−xWx nanocrystalline films of Zr-W solid solutions and ZrW2 Laves phase were synthesized by magnetron co-sputtering. Large values of the H/E ratio up to 0.09 are observed for grain sizes in the nanometer range along ...