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Titolo:
Crossover criticality in complex fluids
Autore:
Anisimov, MA;
Indirizzi:
Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA Univ Maryland College Pk MD USA 20742 & Technol, College Pk, MD 20742 USA Univ Maryland, Dept Chem Engn, College Pk, MD 20742 USA Univ Maryland College Pk MD USA 20742 Chem Engn, College Pk, MD 20742 USA
Titolo Testata:
JOURNAL OF PHYSICS-CONDENSED MATTER
fascicolo: 8A, volume: 12, anno: 2000,
pagine: A451 - A457
SICI:
0953-8984(20000228)12:8A<A451:CCICF>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
IONIC BINARY MIXTURE; COEXISTENCE CURVE; COULOMBIC CRITICALITY; POLYMER-SOLUTIONS; CRITICAL EXPONENT; LIGHT-SCATTERING; DIPHENYL ETHER; CRITICAL-POINT; POLYSTYRENE; METHYLCYCLOHEXANE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Anisimov, MA Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA Univ Maryland College Pk MD USA 20742 llege Pk, MD 20742 USA
Citazione:
M.A. Anisimov, "Crossover criticality in complex fluids", J PHYS-COND, 12(8A), 2000, pp. A451-A457

Abstract

If the structure of a complex fluid is characterized by a nanoscopic or mesoscopic length scale comparable with the correlation length of critical fluctuations, a specific sharp crossover from classical mean-field behaviour to Ising asymptotic behaviour is observed. In the region far away From the critical point where the correlation length is still smaller than this structural length scale, one can observe mean-field behaviour. Ultimately, in the nearest vicinity of the critical point, the correlation length becomes dominant and one should expect Ising singular behaviour. Such a crossover isobserved in polymer solutions, where the structural length scale is controlled by the molecular weight of polymer, and in aqueous salt solutions, where the range of Ising behaviour can be tuned by the salt concentration. Thestructural length diverges at a tricritical point. Crossover to mean-fieldtricriticality can be naturally incorporated into a universal scaling description of polymer solutions.

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Documento generato il 31/03/20 alle ore 19:35:13