Title :
Stability of citrate-coated magnetite and cobalt-ferrite nanoparticles under laser irradiation: a Raman spectroscopy investigation
Author :
da Silva, S.W. ; Melo, T.F.O. ; Soler, M.A.G. ; Lima, E.C.D. ; da Silva, M.F. ; Morais, P.C.
Author_Institution :
Inst. de Fisica, Univ. de Brasilia, Brasilia-DF, Brazil
Abstract :
In this paper, Raman spectroscopy was used to investigate the chemical and structural properties of citrate-coated Fe3O4 and CoFe2O4 nanoparticles. The Raman data obtained from the two samples investigated are compared with the Raman data from the literature of bulk maghemite and bulk hematite. The Raman data are used to discuss the higher structural stability of the CoFe2O4-based sample in comparison to the Fe3O4-based sample, when submitted to optical illumination at different intensities.
Keywords :
Raman spectra; cobalt compounds; ferrites; iron compounds; laser beam effects; magnetic fluids; magnetic particles; nanoparticles; CoFe2O4; Fe3O4; Raman spectroscopy; bulk hematite; bulk maghemite; chemical properties; citrate-coated cobalt-ferrite nanoparticles; citrate-coated magnetite nanoparticles; laser irradiation; magnetic fluid; structural stability; Biomedical optical imaging; Chemicals; Iron; Laser stability; Magnetic separation; Nanoparticles; Raman scattering; Spectroscopy; Structural engineering; Surface treatment;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.815540
