1. Combined small-angle x-ray scattering/extended x-ray absorption fine structure study of coated Co nanoclusters in bis(2-ethylhexyl)sulfosuccinate
- Author
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Giuseppe Portale, Angela Ruggirello, Alessandro Longo, V. Turco Liveri, Antonino Martorana, F. Giordano, Francesco Giannici, Longo, A, Giordano, F, Giannici, F, Martorana, A, Ruggirello, AM, and Turco Liveri, V
- Subjects
Materials science ,Extended X-ray absorption fine structure ,Small-angle X-ray scattering ,Inorganic chemistry ,General Physics and Astronomy ,chemistry.chemical_element ,Nanoparticle ,Micelle ,Nanoclusters ,Sodium borohydride ,chemistry.chemical_compound ,chemistry ,SAXS, EXAFS, micelle, cobalt, nanoparticle ,Absorption (chemistry) ,Cobalt ,Nuclear chemistry - Abstract
Chemically stable cobalt nanostructures have been prepared with Co(II) reduction in the confined space of cobalt bis(2-ethylhexyl)sulfosuccinate, Co(AOT)2, reverse micelles dispersed in n-heptane. The reaction was carried out by adding a solution of sodium borohydride in ethanol (1% weight) to a 0.2M micellar solution of Co(AOT)2 in n-heptane at a reductant to Co(II) molar ratio of 4. This procedure involves the rapid formation of surfactant-coated Co nanoparticles followed by their slow separation as nanostructures embedded in a sodium bis(2-ethylhexyl)sulfosuccinate matrix. The resulting composites, characterized by extended x-ray absorption fine structure and small-angle x-ray scattering, showed the presence of subnanometer sized cobalt nanoparticles aggregated together to form elongated structures coated by the surfactant molecules.
- Published
- 2009