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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:27 |
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Conference: Bucharest University Faculty of Physics 2004 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Structural Studies of Ferrofluids by Small-Angle Neutron Scattering
Authors:
M.Balasoiu(a,b), M.V.Avdeev(a),V.Ghenescu(b),M.Ghenescu(b), Gy.Torok (c), L.Rosta (c), D.Bica (d), L.Vekas (d)
Affiliation:
(a)Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia
(b)Institute of Space Sciences, Bucharest, Romania
(c)Research Institute for Solid State Physics and Optics, Budapest, Hungary
(d)Center for Fundamental and Advanced Technical Research, Timisoara, Romania
E-mail
Keywords:
Ferrofluids, neutron scattering
Abstract:
Ferrofluids or magnetic fluids – colloidal suspensions of single domain magnetic particles of about 100Ǻ in diameter, stabilized with a surfactant shell in a suitable liquid carrier – are of current interest. One of the most powerful techniques involved is the small-angle neutron scattering (SANS). This is particularly suited to the study of magnetic colloids, because of the peculiar features of their magnetic interaction with, which enable the determination of the colloidal dispersion structure under a wide variety of experimental conditions.
We present our investigations on ferrofluids were performed on the YuMO small-angle neutron scattering diffractometer in function at the IBR-2 pulsed reactor at the Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia and on the SANS diffractometer installed at VVR-SM steady reactor at the Research Institute for Solid State Physics and Optics, Budapest, Hungary. There can be investigated the structure of the particle, the aggregation phenomena, the magnetic liquid dynamics, particle-surfactant interaction, surfactant liquid-base interaction and structure, magnetic behavior of the samples.
Ferrofluids exhibit a remarkably rich variety of behaviors and their study has been and still remains very active, since it is considered to open new technological frontiers. These materials are important for technological application as for their intrinsic physical properties. To understand and to improve the interesting macroscopic level, and how this structure is influenced by the action of certain parameters. Due to specific properties in a magnetic field they have been actively used o lot of industrial, technical, as well as in biological and medical applications.
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