Characterization of aggregate state of polydisperse ferrofluids: Some aspects of anisotropy analysis of 2D SAXS in magnetic field

被引：11

作者：

Veligzhanin, A. A. ^{[1
]}

Frey, D. I. ^{[2
]}

Shulenina, A. V. ^{[1
,3
]}

Gruzinov, A. Yu. ^{[4
]}

Zubavichus, Ya. V. ^{[1
]}

Avdeev, M. V. ^{[3
,5
]}

机构：

[1] Natl Res Ctr, Kurchatov Inst, Moscow, Russia

[2] RAS, Shirshov Inst Oceanol, Moscow, Russia

[3] Lomonosov Moscow State Univ, Fac Phys, Moscow, Russia

[4] DESY, EMBL, Hamburg, Germany

[5] Joint Inst Nucl Res, Dubna, Moscow Reg, Russia

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2018年 / 459卷

关键词：

Ferrofluids; Magnetic fluids; Small-angle scattering; Dipole-dipole interaction; Dipolar fluids; Aggregation; SMALL-ANGLE NEUTRON; X-RAY-SCATTERING; RADIATION; DYNAMICS; SYSTEMS;

D O I：

10.1016/j.jmmm.2017.10.052

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

2D small-angle X-ray scattering (SAXS) patterns for dilute ferrofluids with different degree of particle interaction under external magnetic field are analyzed to obtain structural characteristics of aggregates formed by polydisperse particles. Classical ferrofluids based on organic low-polarity solvents (toluene, decalin) with dispersed nanoparticles of magnetite and cobalt coated with oleic acid and water-based ferrofluid with dispersed magnetite nanoparticles coated with double layer of sodium oleate, are studied. All systems show the Langevin type behavior regarding the orientation of the anisotropic aggregates in them with the saturation at a relatively weak magnetic field strength. The field-induced anisotropy in the SAXS patterns is considered in the frame of a simple approximation. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：285 / 289

页数：5

共 27 条

[11] Dipolar structures in magnetite ferrofluids studied with small-angle neutron scattering with and without applied magnetic field [J].