Particle correlations in concentrated aqueous ferrofluids upon dilution by small-angle X-ray scattering

被引：0
|
作者：
Nagornyi, A. V. [1 ]
Avdeev, M. V. [2 ]
Socoliuc, V. [3 ,4 ]
Ivankov, O. I. [2 ]
Tomchuk, A. A. [2 ]
Vekas, L. [3 ]
机构：
[1] Cent European Res Infrastruct Consortium, Trieste, Italy
[2] Joint Inst Nucl Res Dubna, Dubna, Russia
[3] Romanian Acad, Timisoara Branch, Lab Magnet Fluids, Ctr Fundamental & Adv Tech Res, RO-300223 Timisoara, Romania
[4] Politehn Univ Timisoara, Res Ctr Engn Syst Complex Fluids, Timisoara, Romania
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2024年 / 595卷
关键词：
Magnetic fluids; Ferrofluids; Aqueous ferrofluids; Aggregation; Small -angle scattering; SAXS;
D O I：
10.1016/j.jmmm.2024.171923
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Small-angle X-ray scattering is applied to study particle correlations in concentrated (up to 7.5 vol% magnetite) aqueous magnetic fluids with double-layer coating by either oleic or lauric acids. The structure of aggregates in these fluids is analyzed when diluting samples with the goal of finding out a concentration threshold at which the aggregates can be considered weakly interacting independent formations. For dilute systems, suitable models fitting experimental scattering curves are proposed, which take into account the polydispersity of both particles and aggregates. It is shown that particle correlations found in aggregates are dependent on the surfactant coating.
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页数：6
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