Web Release Date: December 7,
Solventless Nanoparticles Synthesis under Low Pressure
and
Department of Chemistry, Pukyong National University, Namgu, Busan 608-737, South Korea, Cheil Industries Inc., Gocheon-Dong, Uiwang-Si, Gyeonggi-Do 437-711, South Korea, and Department of Physics, Pukyong National University, Namgu, Busan 608-737, South Korea
Received August 7, 2007
Abstract:
In the present study, metal nanocrystals were obtained by the very easy, economical, and nontoxic thermal decomposition method and stabilized by coating oleate without any solvent. These nanocrystals have a highly crystalline structure due to a high decomposition temperature (~563-573 K) at low pressure and very narrow distribution. The prepared Fe3O4 nanocrystals were controlled by the annealing time and vacuum pressure. A TEM image of monodispersed Fe3O4 nanocrystals showed the 2D assembly of nanocrystals, demonstrating their uniformity. The particle size is 10.6 ± 1.2 nm. TEM images of silver nanocrystals a showed 2D assembly with 9.5 ± 0.7 nm. An electron diffraction image and X-ray diffraction of the nanocrystals showed the highly crystalline nature of metal nanocrystals.
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