IONIC FERROFLUIDS - INTRAPARTICLE AND INTERPARTICLE CORRELATIONS FROM SMALL-ANGLE NEUTRON-SCATTERING

被引：28
|
作者：
BACRI, JC
BOUE, F
CABUIL, V
PERZYNSKI, R
机构：
[1] CENS,CEA,CNRS,LAB LEON BRILLOUIN,F-91190 GIF SUR YVETTE,FRANCE
[2] UNIV PARIS 06,CNRS,PHYS CHIM INORGAN LAB,F-75252 PARIS 05,FRANCE
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1993年 / 80卷 / 01期
关键词：
INTERPARTICLE CORRELATIONS; INTRAPARTICLE CORRELATIONS; IONIC FERROFLUIDS; SMALL-ANGLE NEUTRON SCATTERING;
D O I：
10.1016/0927-7757(93)80219-5
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ferrofluids are colloidal solutions of subdomain magnetic grains dispersed in a fluid carrier. Chemically synthesized ionic ferrofluids are stabilized in aqueous media through electrostatic charges at the surface of the particles. Like binary mixtures of polymeric solutions, ferrofluids may undergo a phase separation in two coexisting liquids. We explore here the monophasic area of the phase diagram using small-angle neutron scattering from solutions of gamma-Fe2O3 particles of typical size 80 angstrom in the scattering vector q range from 7 x 10(-3) to 1.3 x 10(-1) angstrom-1. In zero magnetic field the isolated particle behaviour is separated from the interparticle structure factor, which varies with the volume fraction up to 8% of magnetic particles.
引用
收藏
页码：11 / 18
页数：8
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