| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9595771 | Surface Science | 2005 | 5 Pages |
Abstract
In the present study we report on the chemical synthesis, the surface passivation process, the peptization in low pH aqueous medium, and the characterization of cobalt-ferrite nanoparticles. The as produced, passivated and peptized cobalt-ferrite nanoparticles were investigated by atomic absorption measurements, transmission electron microscopy, and Mössbauer spectroscopy. The liquid Helium Mössbauer spectra consist of three well-defined sextets in all the studied samples. The data are discussed in terms of the characteristics of the nanoparticle surface layer and the effects produced by the passivation and peptization/aging processes.
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Authors
M.A.G. Soler, S.W. da Silva, V.K. Garg, A.C. Oliveira, R.B. Azevedo, A.C.M. Pimenta, E.C.D. Lima, P.C. Morais,