Title: TiO₂/Co nanomaterials: synthesis and properties

Authors: Le Van Hong, Ngo Thi Hong Le, Nguyen Chi Thuan, Nguyen Xuan Nghia, Nguyen Xuan Phuc

Addresses: Laboratory of Magnetism and Superconductivity, Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam. ' Laboratory of Magnetism and Superconductivity, Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam. ' Laboratory of Magnetism and Superconductivity, Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam. ' Laboratory of Magnetism and Superconductivity, Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam. ' Laboratory of Magnetism and Superconductivity, Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam

Abstract: The formation of anatase phase of TiO₂ was observed and evaluated by using X-ray diffraction and Raman scattering spectra. It was found that the annealing temperature, its temperature rate and Co doping strongly increase the formation velocity of the anatase phase and size of TiO₂ nanoparticles. The creation of Co cluster in TiO₂ thin film was also estimated by using X-ray diffraction and magnetic characterisation in a combinative study. It was found that the annealing temperature remarkably affects the creation of the Co cluster in TiO₂ thin films.

Keywords: DMS; dilute magnetic semiconductors; titanium dioxide; Raman scattering; size effect; magnetisation; cobalt metal nanoclusters; nanotechnology; cobalt doping; nanoparticles; annealing temperature.

DOI: 10.1504/IJNT.2011.038192

International Journal of Nanotechnology, 2011 Vol.8 No.3/4/5, pp.161 - 173

Published online: 21 Jan 2011 *

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