Artículos de revistas
Chemical Synthesis And Structural Characterization Of Highly Disordered Ni Colloidal Nanoparticles
Registro en:
Acs Nano. , v. 2, n. 6, p. 1313 - 1319, 2008.
19360851
10.1021/nn700152w
2-s2.0-47649105677
Autor
Winnischofer H.
Rocha T.C.R.
Nunes W.C.
Socolovsky L.M.
Knobel M.
Zanchet D.
Institución
Resumen
This work focuses on synthetic methods to produce monodisperse Ni colloidal nanoparticles (NPs), in the 4-16 nm size range, and their structural characterization. Narrow size distribution nanoparticles were obtained by high-temperature reduction of a nickel salt and the production of tunable sizes of the Ni NPs was improved compared to other methods previously described. The as-synthesized nanoparticles exhibited spherical shape and highly disordered structure, as it could be assigned by X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). Annealing at high temperature in organic solvent resulted in an increase of nanoparticle atomic ordering; in this case, the XRD pattern showed an fcc-like structure. Complementary data obtained by X-ray absorption spectroscopy confirmed the complex structure of these nanoparticles. 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