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Titolo:
COLLECTIVE AND SINGLE-PARTICLE DYNAMICS NEAR THE ISOTROPIC-NEMATIC PHASE-TRANSITION
Autore:
TORRE R; TEMPESTINI F; BARTOLINI P; RIGHINI R;
Indirizzi:
UNIV FLORENCE,LENS,LARGO E FERMI 2 I-50125 FLORENCE ITALY UNIV BASILICATA,DIPARTIMENTO CHIM I-85100 POTENZA ITALY
Titolo Testata:
Philosophical magazine. B. Physics of condensed matter.Statistical mechanics, electronic, optical and magnetic
fascicolo: 2, volume: 77, anno: 1998,
pagine: 645 - 653
SICI:
1364-2812(1998)77:2<645:CASDNT>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
STIMULATED LIGHT-SCATTERING; TIME-RESOLVED FLUORESCENCE; LIQUID-CRYSTAL; ORIENTATIONAL DYNAMICS; PLASTIC PHASE; ORDER; DEPOLARIZATION; SPECTROSCOPY; RELAXATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
R. Torre et al., "COLLECTIVE AND SINGLE-PARTICLE DYNAMICS NEAR THE ISOTROPIC-NEMATIC PHASE-TRANSITION", Philosophical magazine. B. Physics of condensed matter.Statistical mechanics, electronic, optical and magnetic, 77(2), 1998, pp. 645-653

Abstract

We have studied the single-particle and the collective orientational dynamics of a liquid crystal near the isotropic-nematic phase transition by performing time-resolved spectroscopy experiments. A compared analysis of results allows us to measure selectively the relaxation of single-and pair-particle time-dependent correlation functions. The pair-particle correlation relaxes with a slow monoexponential decay showing strong pre-transitional effects. The single-particle relaxation displays a biexponential decay with no critical phenomena. This experimental study suggests a possible general picture of the molecular dynamics, in which the local orientational order plays a leading role.

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Documento generato il 23/09/20 alle ore 09:42:16