Affiliation:
1. North Caucasian Federal University
Abstract
The optical properties of colloidal solutions of nanosized magnetite particles in kerosene were studied by optical methods (birefringence and light scattering). The data on the birefringence kinetics in nonstationary magnetic fields is used to determine the size distribution of magnetite particles and aggregates. It is shown that the particle size distribution essentially depends on the type of magnetic moments of the particles and aggregates. Static and dynamic light scattering experiments confirm the conclusion about the existence of a significant fraction of nanoparticles in the form of aggregates with sizes of several tens of nanometers.
Publisher
Trans Tech Publications, Ltd.
Subject
Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics
Reference8 articles.
1. J. -C. Bacri, R. Perzynski, D. Salin, J. Servais, Magnetic transient birefringence of ferrofluids: particle size determination. J. de Physique, 48 (1987) 1385-1391.
2. S.P. Stoylov: Colloid Electro-Optics: Theory, Techniques, Applications. Acad. Press, London. (1991).
3. A.N. Tikhonov, V.Y. Arsenin, Solutions of ill posed problems. Wiley, New York. (1977).
4. S.R. Wilson, P.J. Ridler, B.R. Jennings, Magnetic birefringence particle size distribution, J. Phys. D: Appl. Phys. 29 (1996), No. 3 885-888.
5. K.V. Erin, Magnetooptical Studies of Aggregates of Nanoparticles in Colloidal Solutions of Magnetite, Optics and Spectroscopy, 106 (2009), No. 6 858-862.