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Electrochemical synthesis and stabilization of cobalt nanoparticles
Author(s) -
LedoSuárez A.,
RodríguezSánchez L.,
Blanco M. C.,
LópezQuintela M. A.
Publication year - 2006
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200566196
Subject(s) - thermogravimetric analysis , cobalt , nanoparticle , fourier transform infrared spectroscopy , thermal stability , chemical engineering , materials science , electrochemistry , transmission electron microscopy , chemistry , inorganic chemistry , nuclear chemistry , nanotechnology , organic chemistry , electrode , engineering
Cobalt nanoparticles (NPs) were synthesized via an electrochemical method in the presence of tetraalkylammonium salt. The nanometer dimensions of the NPs can be controlled in a simple way by adjustment of the current density. From these particles stable colloidal suspensions are prepared in the presence of a fatty acid (oleic acid) and triphenylphosphine. The colloidal system is stable against oxidation when they are kept in heptane (C 7 H 16 ). Transmission electron microscopy (TEM) was employed to determine the core size and the shape of metal nanoparticles. The chemical interaction of the surfactant with the Co nanoparticles was studied by using Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR). Thermogravimetric analysis (TGA) was used to study the thermal stability and the composition of the capped cobalt nanoparticles. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)