Aggregate stability and magnetic characteristics of colloidal FemOn–SiO2 particles obtained by sol–gel method

Composite Fe m O n –SiO 2 particles have been obtained by precipitation of iron oxide from aqueous solution with the addition of tetraethoxysilane. The shapes and sizes of separate single particles and their aggregates have been determined by scanning electron microscopy. Changes in the stability of...

Full description

Saved in:
Bibliographic Details
Published in:Physics of the solid state 2017-05, Vol.59 (5), p.1008-1013
Main Authors: Vezo, O. S., Gareev, K. G., Korolev, D. V., Kuryshev, I. A., Lebedev, S. V., Moshnikov, V. A., Sergienko, E. S., Kharitonskii, P. V.
Format: Article
Language:English
Subjects:
Low-Dimensional Systems
Physics
Physics and Astronomy
Solid State Physics
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Composite Fe m O n –SiO 2 particles have been obtained by precipitation of iron oxide from aqueous solution with the addition of tetraethoxysilane. The shapes and sizes of separate single particles and their aggregates have been determined by scanning electron microscopy. Changes in the stability of the colloidal suspension due to external magnetic field and the addition of NaCl have been evaluated. Based on magnetization curves obtained on a vibrating-sample magnetometer and characteristics calculated within the theoretical model of magnetostatically interacting particles, it is shown that the composite particles are superparamagnetic.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783417050304