A Study of the Deep Structure of the Energy Landscape of Glassy Polystyrene: the Exponential Distribution of the Energy Barriers Revealed by High-Field Electron Spin Resonance Spectroscopy (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• A Study of the Deep Structure of the Energy Landscape of Glassy Polystyrene: the Exponential Distribution of the Energy Barriers Revealed by High-Field Electron Spin Resonance Spectroscopy (Articolo in rivista) (literal)

Anno

• 2004-01-01T00:00:00+01:00 (literal)

Alternative label

• Bercu, V.; Martinelli, M.; Massa, C.A.; Pardi, L.A.; Leporini, D. (2004)
  A Study of the Deep Structure of the Energy Landscape of Glassy Polystyrene: the Exponential Distribution of the Energy Barriers Revealed by High-Field Electron Spin Resonance Spectroscopy
  
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• Bercu, V.; Martinelli, M.; Massa, C.A.; Pardi, L.A.; Leporini, D. (literal)

Pagina inizio

• L479 (literal)

Pagina fine

• L488 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 16 (literal)

Note

• ISI Web of Science (WOS) (literal)

Titolo

• A Study of the Deep Structure of the Energy Landscape of Glassy Polystyrene: the Exponential Distribution of the Energy Barriers Revealed by High-Field Electron Spin Resonance Spectroscopy (literal)

Abstract

• The reorientation of one small paramagnetic molecule (spin probe) in glassy polystyrene (PS) is studied by high-field electron spin resonance spectroscopy at two different Larmor frequencies (190 and 285 GHz). The exponential distribution of the energy barriers for the rotational motion of the spin probe is unambiguously evidenced at both 240 and 270 K. The same shape for the distribution of the energy barriers of PS was evidenced by the master curves provided by previous mechanical and light scattering studies. The breadth of the energy barrier distribution of the spin probe is in the range of the estimates of the breadth of the PS energy barrier distribution. The evidence that the deep structure of the energy landscape of PS exhibits the exponential shape of the energy barrier distribution agrees with the results from extreme-value statistics (Bouchaud and Mezard 1997 J Phys. A: Math. Gen. 30 7997) and the trap model by Bouchaud and co-workers (1996 J. Phys. A: Math. Gen. 29 3847, 2001 Phys. Rev. B 64 104417). (literal)

Prodotto di

• Istituto per i processi chimico-fisici (IPCF) (Istituto)
• Struttura e dinamica in sistemi autoorganizzati e cooperativi (MD.P01.012.001) (Modulo)

Autore CNR

• DINO LEPORINI (Unità di personale esterno)
• MASSIMO MARTINELLI (Persona)
• CARLO ANDREA MASSA (Unità di personale esterno)
• LUCA PARDI (Unità di personale interno)

Insieme di parole chiave

• Parole chiave di "A Study of the Deep Structure of the Energy Landscape of Glassy Polystyrene: the Exponential Distribution of the Energy Barriers Revealed by High-Field Electron Spin Resonance Spectroscopy" (Insieme di parole chiave)

Incoming links:

Prodotto

• Istituto per i processi chimico-fisici (IPCF) (Istituto)
• Struttura e dinamica in sistemi autoorganizzati e cooperativi (MD.P01.012.001) (Modulo)

Autore CNR di

• LUCA PARDI (Unità di personale interno)
• MASSIMO MARTINELLI (Persona)
• DINO LEPORINI (Unità di personale esterno)
• CARLO ANDREA MASSA (Unità di personale esterno)

Insieme di parole chiave di

• Parole chiave di "A Study of the Deep Structure of the Energy Landscape of Glassy Polystyrene: the Exponential Distribution of the Energy Barriers Revealed by High-Field Electron Spin Resonance Spectroscopy" (Insieme di parole chiave)