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Microstructure investigation of a CoFe2O4/lauric acid/DDS-Na/H2O ferrofluid

M. BALASOIU1,2,* , O. I. IVANKOV1,3, D.V. SOLOVIOV1,3, S.N. LYSENKO4, R.M. YAKUSHEV4, A-M. BALASOIU-GAINA1,5, N. LUPU6

Affiliation

  1. Joint Institute for Nuclear Research, Dubna, Russian Federation
  2. Horia Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania
  3. Taras Shevchenko University, Kiev, Ukraine
  4. Institute of Technical Chemistry, Ural Branch of RAS, Perm, Russian Federation
  5. CMCF, Moscow State University, Moscow, Russian Federation
  6. National Institute of Research and Development for Technical Physics, Iasi, Romania

Abstract

Preliminary microstructural results on a new CoFe2O4/lauric acid/DDS -Na/H2O ferrofluid by means of small angle neutron scattering (SANS), transmission electron microscopy (TEM) and selected area electron diffraction (SAED) are presented. The ferrofluid was prepared by coprecipitation of Fe(OH)3 and Co(OH)2, ferritisation of hydroxide mixture in 1M alkali aqueous solution, adsorption of lauric acid on ferrite particles and peptisation of hydrophobic precipitate in aqueous solution with sodium n-dodecylsulphate. TEM images reveals that though the sizes and the geometrical forms are not uniform, the particles, partially shows rhomboidal shape. The model fit of SANS data gives triaxial ellipsoid and ellipsoidal shell, as objects characterizing the investigated system. Both techniques confirm the simultaneous presence of particles and surfactant. The synthesis procedure of the water suspension of the CoFe2O4 nanoparticles used in the present work appears to be very promising from the aspect of the stability properties and rather high particle concentration improvements..

Keywords

CoFe2O4 ferrofluids, SANS, TEM, SAED.

Submitted at: May 7, 2015
Accepted at: June 24, 2015

Citation

M. BALASOIU, O. I. IVANKOV, D.V. SOLOVIOV, S.N. LYSENKO, R.M. YAKUSHEV, A-M. BALASOIU-GAINA, N. LUPU, Microstructure investigation of a CoFe2O4/lauric acid/DDS-Na/H2O ferrofluid, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 7-8, pp. 1114-1121 (2015)