Ara es mostren els items 1-20 de 21

  • C60 solvate with (1,1,2)-trichloroethane: dynamic statistical disorder and mixed conformation 

    Mitsari, Efstratia; Romanini, Michela; Qureshi, Navid; Tamarit Mur, José Luis; Barrio Casado, María del; Macovez, Roberto (2016-05-27)
    Article
    Accés restringit per política de l'editorial
    We present a full characterization of the orientationally disordered cocrystal of C-60 with (1,1,2)-triChloroethane (C2H3Cl3), by means of X-ray diffraction, Raman spectroscopy, and broadband dielectric spectroscopy. Our ...
  • Collective relaxation dynamics and crystallization kinetics of the amorphous Biclotymol antiseptic 

    Tripathi, Pragya; Romanini, Michela; Tamarit Mur, José Luis; Macovez, Roberto (2015-11-10)
    Article
    Accés obert
    We employ dielectric spectroscopy to monitor the relaxation dynamics and crystallization kinetics of the Biclotymol antiseptic in its amorphous phase. The glass transition temperature of the material as determined by ...
  • Double primary relaxation in a highly anisotropic orientational glass-former with low-dimensional disorder 

    Romanini, Michela; Barrio Casado, María del; Capaccioli, Simon; Ruíz Martín, María Dolores; Macovez, Roberto; Tamarit Mur, José Luis (2016-04-26)
    Article
    Accés obert
    The freezing of the cooperative reorientational motions in orientationally disordered (OD) molecular crystals marks the so-called \glassy" transition, which may be considered a lower-dimensional version of the structural ...
  • Emergence of glassy-like dynamics in an orientationally ordered phase 

    Romanini, Michela; Negrier, Philippe; Tamarit Mur, José Luis; Capaccioli, Simon; Barrio Casado, María del; Pardo Soto, Luis Carlos; Mondieig, Denise (2012-04-04)
    Article
    Accés obert
    The dynamics of a simple rigid pseudoglobular molecule (2-adamantanone) has been studied by means of dielectric spectroscopy and examined under the constraints imposed by the space group of the crystal structure determined ...
  • Hopping conductivity and polarization effects in a fullerene derivative salt 

    Macovez, Roberto; Zachariah, Manesh; Romanini, Michela; Zygouri, Panagiota; Gournis, Dimitrios; Tamarit Mur, José Luis (2014-06-12)
    Article
    Accés restringit per política de l'editorial
    Impedance spectroscopy is employed to probe the frequency-dependent conductivity and dielectric response of the C60O24Na 24 fulleride. The conduction properties of this organic material match the so-called universal behavior ...
  • Implanted muon spin spectroscopy on 2-O-adamantane: a model system that mimics the liquid 

    Romanini, Michela; Tamarit Mur, José Luis; Pardo Soto, Luis Carlos; Bermejo, F. J.; Fernandez Perea, Ricardo; Pratt, F. L. (2017-03-01)
    Article
    Accés obert
    The transition taking place between two metastable phases in 2-O-adamantane, namely the [Formula: see text] cubic, rotator phase and the lower temperature P21/c, Z  =  4 substitutionally disordered crystal is studied by ...
  • Molecular diffusion and dc conductivity perfectly correlated with molecular rotational dynamics in a plastic crystalline electrolyte 

    Zachariah, Manesh; Romanini, Michela; Tripathi, Pragya; Tamarit Mur, José Luis; Macovez, Roberto (2015-01-01)
    Article
    Accés obert
  • Orientational relaxations in solid (1,1,2,2)tetrachloroethane 

    Tripathi, Pragya; Mitsari, Efstratia; Romanini, Michela; Serra, Pablo; Tamarit Mur, José Luis; Zuriaga, Jose Mariano; Macovez, Roberto (2016)
    Article
    Accés obert
    We employ dielectricspectroscopy and molecular dynamic simulations to investigate the dipolar dynamics in the orientationally disordered solid phase of (1,1,2,2)tetrachloroethane. Three distinct orientational dynamics are ...
  • Polymorphism of 2-Adamantanone 

    Negrier, Philippe; Barrio Casado, María del; Romanini, Michela; Tamarit Mur, José Luis; Mondieig, Denise; Krivchikov, Alexander I; Kepinski, L.; Jezowski, Andrzej; Szewczyk, Daria (2014-05-07)
    Article
    Accés restringit per política de l'editorial
    The polymorphism of 2-adamantanone (C10H14O) has been investigated by means of X-ray diffraction and high-pressure thermal analysis. The intricate behavior of the low-temperature crystalline phases has been disentangled. ...
  • Protonic surface conductivity and proton space-charge relaxation in hydrated fullerol 

    Mitsari, Efstratia; Romanini, Michela; Barrio Casado, María del; Tamarit Mur, José Luis; Macovez, Roberto (2017-03-09)
    Article
    Accés restringit per política de l'editorial
    The ac dielectric properties of both anhydrous fullerol (C-60(OH)(24)) and hydrated fullerol with 20% water mass content are investigated by means of temperature-dependent dielectric spectroscopy. Anhydrous polycrystalline ...
  • Relaxation dynamics in disordered systems 

    Romanini, Michela (Universitat Politècnica de Catalunya, 2015-07-22)
    Tesi
    Accés obert
    The nature of the glass transition and of the glassy state is a fundamental and still unsolved problem of condensed matter physics. Many liquids can be supercooled below their melting point without crystallizing, that is, ...
  • Scaling the dynamics of orientationally disordered mixed crystals 

    Romanini, Michela; Martínez García, Julio Cesar; Tamarit Mur, José Luis; Rzosca, S. J.; Barrio Casado, María del; Pardo Soto, Luis Carlos; Drozd Rzosca, A. (2009-11-14)
    Article
    Accés restringit per política de l'editorial
    The evolution of the primary relaxation time of orientationally disordered (OD) mixed crystals [(CH3)2C(CH2OH)2]1−X[(CH3)C(CH2OH)3]X, with 0<X ≤ 0.5, on approaching the glass temperature (Tg) is discussed. The application ...
  • Self-Diffusion, Phase Behavior, and Li+ Ion Conduction in Succinonitrile-Based Plastic Cocrystals 

    Zachariah, Manesh; Romanini, Michela; Tripathi, Pragya; Barrio Casado, María del; Tamarit Mur, José Luis; Macovez, Roberto (2015-11-11)
    Article
    Accés obert
    We study the temperature-dependent molecular dynamics, ion conduction, and phase behavior of plastic-crystal electrolytes based on the succinonitrile molecule. We employ calorimetry and dielectric spectroscopy to probe ...
  • Silicon-Chip-Based Dielectric Spectroscopy for Conductivity and Molecular Dynamics Studies of Organic Films 

    Tripathi, Pragya; Gonzalo Ruiz, Javier; Mitsari, Efstratia; Zachariah, Manesh; Romanini, Michela; Tamarit Mur, José Luis; Muñoz Berbel, F. Xavier; Macovez, Roberto (2014-07-29)
    Article
    Accés restringit per política de l'editorial
    Interdigital electrodes fabricated by standard lithography on silicon chips are employed to probe the dipolar molecular dynamics and electric conduction properties of thin rhodamine films grown with two different methods. ...
  • Solid state physicochemical properties and applications of organic and metallo-organic fullerene derivatives 

    Mitsari, Efstratia; Romanini, Michela; Manesh, Zachariah; Macovez, Roberto (2016)
    Article
    Accés obert
    We review the fundamental properties and main applications of organic derivatives and complexes of fullerenes in the solid-state form. We address in particular the structural properties, in terms of crystal structure, ...
  • Structure and reorientational dynamics of 1-F-adamantane 

    Ben Hassine, Bacem; Negrier, Philippe; Romanini, Michela; Barrio Casado, María del; Macovez, Roberto; Kallel, A.; Mondieig, Denise; Tamarit Mur, José Luis (2016-03-17)
    Article
    Accés obert
    The polymorphism and the dynamics of a simple rigid molecule (1-fluoro-adamantane) have been studied by means of X-ray powder diffraction and broadband dielectric spectroscopy. At temperatures below the melting point, the ...
  • Thermodynamic scaling of the dynamics of a strongly hydrogen-bonded glass-former 

    Romanini, Michela; Barrio Casado, María del; Macovez, Roberto; Ruíz Martín, María Dolores; Capaccioli, Simone; Tamarit Mur, José Luis (Macmillan Publishers, 2017-12-01)
    Article
    Accés obert
    We probe the temperature- and pressure-dependent specific volume (v) and dipolar dynamics of the amorphous phase (in both the supercooled liquid and glass states) of the ternidazole drug (TDZ). Three molecular dynamic ...
  • Ultraslow dynamics of water in organic molecular solids 

    Macovez, Roberto; Mitsari, Efstratia; Zachariah, Manesh; Romanini, Michela; Zygouri, Panagiota; Gournis, Dimitrios; Tamarit Mur, José Luis (2014-03-06)
    Article
    Accés restringit per política de l'editorial
    The relaxation dynamics of water in hygroscopic molecular solids is probed by broadband dielectric spectroscopy in the temperature range from 200 to 450 K. Evidence is found for three types of dynamic processes. The ...
  • Variable-range electron hopping, conductivity cross-over and space-charge relaxation in C60Br6 

    Manesh, Zachariah; Romanini, Michela; Zygouri, Panagiota; Gournis, Dimitrios; Tamarit Mur, José Luis; Barrio Casado, María del; Macovez, Roberto (2016-07-01)
    Article
    Accés restringit per política de l'editorial
    Dielectric spectroscopy is employed to probe the frequency-dependent conductivity and dipolar dielectric response of solid C60Br6. Below approximately 215 K, charge conduction is electronic and well described by Mott's ...
  • Water-triggered conduction and polarization effects in a hygroscopic fullerene salt 

    Zachariah, Manesh; Tripathi, Pragya; Mitsari, Efstratia; Romanini, Michela; Zygouri, Panagiota; Gournis, Dimitrios; Barrio Casado, María del; Tamarit Mur, José Luis; Macovez, Roberto (2014)
    Comunicació de congrés
    Accés obert
    Impedance spectroscopy is employed to probe the frequency-dependent conductivity and dielectric response of the crystalline C60O24Na24 fulleride, both in its pure form obtained by heating to 473 K and in its bulk-hydrate ...