Aggregate Stability and Magnetic Characteristics of Colloidal FemOn-SiO2 Particles Obtained by Sol-Gel Method

O. S. Vezo, K. G. Gareev, D. V. Korolev, I. A. Kuryshev, S. V. Lebedev, V. A. Moshnikov, E. S. Sergienko, P. V. Kharitonskii

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Composite FemOn-SiO2 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.

Original languageEnglish
Pages (from-to)1008-1013
Number of pages6
JournalPhysics of the Solid State
Volume59
Issue number5
DOIs
StatePublished - May 2017

Keywords

  • IRON-OXIDE NANOPARTICLES
  • NMR RELAXOMETRY
  • SPECTROSCOPY
  • FIELD

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