Magnetic Properties and Size Distribution of Magnetite Nanoparticles Covered by Oleic Acid

  • Y. Fernández-Afonso Centro de Estudios Avanzados de Cuba, Km 1 y 1/2 Carr. San Antonio de los Baños, Valle Grande, La Lisa, La Habana 17100, Cuba
  • A. Maury-Toledo Centro de Estudios Avanzados de Cuba, Km 1 y 1/2 Carr. San Antonio de los Baños, Valle Grande, La Lisa, La Habana 17100, Cuba
  • O. García-Zaldívar Facultad de Física - Instituto de Ciencia y Tecnología de Materiales, Universidad de La Habana, San Lázaro y L, La Habana 10400, Cuba
  • M. A. Hernández-Landaverde CINVESTAV-Unidad Querétaro, Libramiento Norponiente No. 2000 Real de Juriquilla, Querétaro, Qro. 76230, México
  • R. Ramirez-Bon CINVESTAV-Unidad Querétaro, Libramiento Norponiente No. 2000 Real de Juriquilla, Querétaro, Qro. 76230, México
  • J. M. Yañez-Limón CINVESTAV-Unidad Querétaro, Libramiento Norponiente No. 2000 Real de Juriquilla, Querétaro, Qro. 76230, México
  • S. Díaz-Castañón División Materiales Avanzados, Instituto Potosino de Investigación Científica Tecnológica, San Luis Potosí, 78216, México
  • Y. González-Alfaro Centro de Estudios Avanzados de Cuba, Km 1 y 1/2 Carr. San Antonio de los Baños, Valle Grande, La Lisa, La Habana 17100, Cuba
  • F. Calderón-Piñar Facultad de Física - Instituto de Ciencia y Tecnología de Materiales, Universidad de La Habana, San Lázaro y L, La Habana 10400, Cuba & CINVESTAV-Unidad Querétaro, Libramiento Norponiente No. 2000 Real de Juriquilla, Querétaro, Qro. 76230, México

Abstract

The particle size and particle size distribution are very important to biomedical applications because the uptake of nanoparticles is strongly dependent on particle size. Oleic acid coated magnetite nanoparticles were synthesized by using chemical co-precipitation. The average particle size and particle size distribution measured by different techniques are compared. The crystallite sizes estimated by X-Ray Diffraction (9.32 nm) and the average particle size calculated by Transmission Electron Microscopy (9.46 nm) are very similar. Atomic Force Microscopy revealed an average diameter of 1030 nm, which is bigger than estimated by other techniques due to the oleic acid layer covering the nanoparticles. The distribution of magnetic sizes of nanoparticles was also estimated through the magnetic response of the system, using the Langevin model (9.11 nm). Anisotropy constant (Ka = 4.74 *105 erg/cm3) and blocking temperature (TB = 118 K) were obtained.

Published
Jul 6, 2017
How to Cite
FERNÁNDEZ-AFONSO, Y. et al. Magnetic Properties and Size Distribution of Magnetite Nanoparticles Covered by Oleic Acid. Revista Cubana de Física, [S.l.], v. 34, n. 1, p. 3-8, july 2017. ISSN 2224-7939. Available at: <http://www.revistacubanadefisica.org/index.php/rcf/article/view/RCF_34-1_3>. Date accessed: 22 nov. 2017.
Section
Original Articles