The fragile to strong dynamical crossover in supercooled liquids. The o-terphenyl case and its ergodicity at the dynamical arrest (Articolo in rivista)

Type
Label
  • The fragile to strong dynamical crossover in supercooled liquids. The o-terphenyl case and its ergodicity at the dynamical arrest (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.4794552 (literal)
Alternative label
  • F Mallamace, C Corsaro, N Micali, V Villari, N Leone, S H Chen (2013)
    The fragile to strong dynamical crossover in supercooled liquids. The o-terphenyl case and its ergodicity at the dynamical arrest
    in AIP conference proceedings
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • F Mallamace, C Corsaro, N Micali, V Villari, N Leone, S H Chen (literal)
Pagina inizio
  • 67 (literal)
Pagina fine
  • 76 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 1518 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • - Dipartimento di Fisica and CNISM, Universit√† di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy - CNR-IPCF Consiglio Nazionale Delle Ricerche, Istituto per i Processi Chimico Fisici, Viale F. Stagno d'Alcontres 37, 98158 Messina, Italy - Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States (literal)
Titolo
  • The fragile to strong dynamical crossover in supercooled liquids. The o-terphenyl case and its ergodicity at the dynamical arrest (literal)
Abstract
  • We report a study of the dynamic crossover in two different glass-forming materials: an adhesive hard-sphere (AHS) colloidal system and the molecular liquid o-terphenyl. Systems that present a fragile-to-strong dynamical crossover in their transport parameters. A combination of light scattering, viscosity and nuclear magnetic resonance (NMR) is used to study the dynamical arrest in these systems. In both systems the data analysis is made in the conceptual framework of the Mode Coupling Theory in its extended version. For the AHS colloid, which is characterized by clustering process, we give evidence that the evolution toward the arrested phase can be described by using both the temperature and the concentration as the order parameter. The light scattering studies conducted on the o-terphenyl confirm the suggestion of recent statistical mechanical approaches that such a molecular system remains ergodic also below the calorimetric glass-transition temperature. (literal)
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