Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
DYNAMICS OF CONCENTRATED COLLOIDAL SUSPENSIONS PROBED BY X-RAY CORRELATION SPECTROSCOPY
Autore:
TSUI OKC; MOCHRIE SGJ;
Indirizzi:
MIT,DEPT PHYS,77 MASSACHUSETTS AVE CAMBRIDGE MA 02139
Titolo Testata:
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
fascicolo: 2, volume: 57, anno: 1998,
parte:, B
pagine: 2030 - 2034
SICI:
1063-651X(1998)57:2<2030:DOCCSP>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
COUPLING-THEORY ANALYSIS; LIGHT-SCATTERING; GLASS-TRANSITION; BROWNIAN-MOTION; SPHERES; DIFFUSION; DISPERSIONS; PARTICLES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
O.K.C. Tsui e S.G.J. Mochrie, "DYNAMICS OF CONCENTRATED COLLOIDAL SUSPENSIONS PROBED BY X-RAY CORRELATION SPECTROSCOPY", Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 57(2), 1998, pp. 2030-2034

Abstract

We report x-ray intensity fluctuation spectroscopy (XIFS) measurements of the equilibrium dynamics of colloidal suspensions of charge-stabilized Sb2O5 spheres of radius 250+/-40 Angstrom in glycerol. The dynamics were investigated for times between 4 and several thousand seconds, and for wave vectors, Q, from 0.003 to 0.012 Angstrom(-1), well beyond wave vectors that can be studied with visible light. The unique advantages of XIFS for studies of concentrated suspensions composed of refractive-index-mismatchcd components have not previously been explored. Here, we study a dilute sample (sample I) and a concentrated sample (sample Il). For sample I, the diffusion coefficient is independent ofQ, with a value consistent with the Stokes-Einstein relation. For sample II (effective hard-sphere volume fraction, phi = 0.18), the diffusion coefficient exhibits a minimum at the peak of the structure factor, indicating modifications to Brownian behavior due to interparticle interactions. [S1063-651X(98)10802-4].

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/10/20 alle ore 01:47:17