Electrochemical synthesis and stabilization of cobalt nanoparticles
| Autor: | M. A. López-Quintela, M. C. Blanco, L. Rodriguez-Sanchez, A. Ledo-Suarez |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Thermogravimetric analysis
Analytical chemistry Nanoparticle chemistry.chemical_element Infrared spectroscopy Surfaces and Interfaces Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Thermogravimetry chemistry Chemical engineering Materials Chemistry Thermal stability Particle size Electrical and Electronic Engineering Fourier transform infrared spectroscopy Cobalt |
| Zdroj: | physica status solidi (a). 203:1234-1240 |
| ISSN: | 1862-6319 1862-6300 |
| DOI: | 10.1002/pssa.200566196 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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