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Synthesis of highly crystalline and monodisperse maghemite nanocrystallites without a size-selection process

Cited 1,666 time in Web of Science Cited 1,705 time in Scopus
Authors
Hyeon, Taeghwan; Lee, Su Seong; Park, Jongnam; Chung, Yunhee; Na, Hyon Bin
Issue Date
2001-12
Citation
Journal of the American Chemical Society, Vol.123 No.51, pp.12798-12801
Abstract
The synthesis of highly crystalline and monodisperse gamma -Fe2O3 nanocrystallites is reported. High-temperature (300 degreesC) aging of iron-oleic acid metal complex, which was prepared by the thermal decomposition of iron pentacarbonyl in the presence of oleic acid at 100 degreesC, was found to generate monodisperse iron nanoparticles. The resulting iron nanoparticles were transformed to monodisperse gamma -Fe2O3 nanocrystallites by controlled oxidation by using trimethylamine oxide as a mild oxidant. Particle size can be varied from 4 to 16 nm by controlling the experimental parameters. Transmission electron microscopic images of the particles showed 2-dimensional and 3-dimensional assembly of particles, demonstrating the uniformity of these nanoparticles. Electron diffraction, X-ray diffraction, and high-resolution transmission electron microscopic (TEM) images of the nanoparticles showed the highly crystalline nature of the gamma -Fe2O3 structures. Monodisperse gamma -Fe2O3 nanocrystallites with a particle size of 13 mn also can be generated from the direct oxidation of iron pentacarbonyl in the presence of oleic acid with trimethylamine oxide as an oxidant.
ISSN
0002-7863
URI
http://hdl.handle.net/10371/166094
DOI
https://doi.org/10.1021/ja016812s
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Chemical Convergence for Energy and Environment (에너지환경 화학융합기술전공)Journal Papers (저널논문_에너지환경 화학융합기술전공)
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