Saturday, April 19, 2014

 

 



Soy un nuevo usuario

Olvidé mi contraseña

Entrada usuarios

Lógica Matemáticas Astronomía y Astrofísica Física Química Ciencias de la Vida
Ciencias de la Tierra y Espacio Ciencias Agrarias Ciencias Médicas Ciencias Tecnológicas Antropología Demografía
Ciencias Económicas Geografía Historia Ciencias Jurídicas y Derecho Lingüística Pedagogía
Ciencia Política Psicología Artes y Letras Sociología Ética Filosofía


Emergence of glassy-like dynamics in an orientationally ordered phase

1) La descarga del recurso depende de la página de origen
2) Para poder descargar el recurso, es necesario ser usuario
    registrado en Universia

  Descargar recurso

Detalles del recurso

Pertenece a: UPCommons - E-prints UPC Universitat Politècnica de Catalunya   

Descripción: 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 by x-ray powder diffraction. The low-temperature monoclinic structure of 2-adamantanone, with one molecule per asymmetric unit (Z'= 1), displays a statistical intrinsic disorder, concerning the site occupancy of the oxygen atom along three different sites. Such a physically identifiable disorder gives rise to large-angle molecular rotations which inherently lead to time-average fluctuations of the molecular dipole, thus contributing to the dielectric susceptibility. The dielectric spectra for the low-temperature “ordered” phase displays a universal feature of glassy-like materials, i.e., coexistence of α- and β-relaxation processes. The former is clearly identified with the strongly restricted reorientational motions within the long-range “ordered” crystalline lattice. The latter, never observed before in fully translationally and highly orientationally ordered phases, displays all the properties of an original Johari-Goldstein β-relaxation, in spite of the strong character of this glass-like phase. These findings can be explained according to the coupling model, applied to such “ordered” phases.

Autor(es): Romanini, Michela -  Negrier, Philippe -  Tamarit Mur, José Luis -  Capaccioli, Simon -  Barrio Casado, María del -  Pardo Soto, Luis Carlos -  Mondieig, Denise - 

Id.: 55226407

Idioma: inglés  - 

Versión: 1.0

Estado: Final

Tipo:  0 p. - 

Palabras claveÀrees temàtiques de la UPC -  Enginyeria dels materials - 

Tipo de recurso: Article  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: Open Access

Formatos:  0 p. - 

Requerimientos técnicos:  Browser: Any - 

Relación: [References] http://link.aps.org/doi/10.1103/PhysRevB.85.134201

Fecha de contribución: 05-may-2013

Contacto:

Localización:
* Romanini, M. [et al.]. Emergence of glassy-like dynamics in an orientationally ordered phase. "Physical review B: condensed matter and materials physics", 04 Abril 2012, vol. 85, núm. 13, p. 134201-1-134201-7.
* 1098-0121
* 10.1103/PhysRevB.85.134201


Otros recursos del mismo autor(es)

  1. On the structure of water and chloride ion interactions with a peptide backbone in solution The arrangement of water and chloride ions around a model peptide (glycyl-L-prolyl-glycine-NH2) was ...
  2. On the structure of water and chloride ion interactions with a peptide backbone in solution The arrangement of water and chloride ions around a model peptide (glycyl-L-prolyl-glycine-NH2) wasi...
  3. Benzocaine polymorphism: Pressure-temperature phase diagram involving forms II and III tUnderstanding the phase behavior of an active pharmaceutical ingredient in a drug formulation isreq...
  4. Benzocaine polymorphism: Pressure-temperature phase diagram involving forms II and III tUnderstanding the phase behavior of an active pharmaceutical ingredient in a drug formulation isreq...
  5. Rimonabant dimorphism and its pressure–temperature phasegiagram: A delicate case of overall monotropic behavior Crystalline polymorphism occurs frequently in the solid state of active pharmaceutical ingredients, ...

Otros recursos de la misma colección

  1. Environmental management tools for ports Ports are very complex systems from the point of view of environment. In fact, the very existence of...
  2. Using DDM asymmetry metrics for wind direction retrieval from GPS ocean-scattered signals in airborne experiments Reflectometry of signals of opportunity such as those emitted by a global navigation satellite syste...
  3. Optical signal processor for millimeter-wave interferometric radiometry In interferometric radiometry, the correlations between all pairs of radio-frequency (RF) receivers ...
  4. Fuzzy approach for risk assessment of brominated flame retardants in aquatic ecosystems Brominated flame retardants (BFR) are pollutants that represent a threat to both human health and e...
  5. Differential optical feedback interferometry for the measurement of nanometric displacements We have recently proposed differential optical feedback interferometry as a convenient method to mea...

Valoración de los usuarios

No hay ninguna valoración para este recurso.Sea el primero en valorar este recurso.
 

Busque un recurso