Coating ferrite on LATEX spheres due to fabrication of three-dimensional magneto-photonic crystal

This work was aimed at fabrication of a three-dimensional magento-photonic crystal. In our experiments LATEX spheres with diameter of about 200 nm were coated with Fe3O4 fine particle. The diameter of Fe3O4 fine particles is about 30 nm when ration of Fe3+ / Fe2+ (r) = 3% and pH = 8.6. The diameter of these particles decreases about 10 nm by increasing up to r=20% in the same pH region. It was found that a decrease of the coated particles size can be made as low as the size of 5% of LATEX spheres diameter. Therefore, it may use these particles for preparation a three-dimensional magento-dielectric structure.