New Electric Double-Layered Magnetic Fluids Based on Copper, Nickel, and Zinc Ferrite Nanostructures

Autor: Sousa, M. H., Tourinho, F. A., Depeyrot, J., Silva, G. J. da, Lara, M. C. F. L.
Zdroj: The Journal of Physical Chemistry - Part B; February 2001, Vol. 105 Issue: 6 p1168-1175, 8p
Abstrakt: We report on stable colloidal aqueous suspensions of magnetic nanostructures made of copper, nickel, and zinc ferrites. These magnetic fluids could represent a new alternative for biological applications. The basic steps of the nanoparticles synthesis, their chemical surface treatment, and their peptization in a stable colloidal sol are given. Their chemical composition is carefully checked, and X-ray diffraction patterns provide both their mean size and a structural characterization. Magnetization results obtained at 300 K are presented and discussed.
Databáze: Supplemental Index