Abstract
Iron nanoparticles were prepared by thermal decomposition under 180/spl deg/C with 0.256M iron pentacaronyl and 0 M-0.085M oleylamine as a surfactant. Sizes of the synthesized iron nanoparticles are from 4.8nm to 10.9nm depending on the decomposition times in the range from 10 to 60min. The surfactant concentration is a key factor for controlling the size and shape of iron nanoparticles. The synthesized iron particles without surfactant are flocculated to be clusters of 20-50nm. In the case of using 0.0425M surfactant, the obtained particles are almost sphere. While oleylamine concentration was added up to 0.085M, several iron nuclei are agglomerated together regularly. It is confirmed that the synthesized iron particles are amorphous, but the surface of the particles is easily oxidized and to be spinel structured iron oxide by HRTEM.
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