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Author Morjan, Ion ♦ Alexandrescu, R. ♦ Dumitrache, F. ♦ Fleaca, C. ♦ Birjega, R. ♦ Soare, I. ♦ Luculescu, C. -R. ♦ Prodan, V. ♦ Kuncser, V. ♦ Filoti, G. ♦ Xu, H. ♦ Wang, D.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword NANOSCIENCE AND NANOTECHNOLOGY ♦ COMPOSITE MATERIALS ♦ ELECTRON DIFFRACTION ♦ GRAIN SIZE ♦ IRON CARBIDES ♦ IRON-ALPHA ♦ LASER RADIATION ♦ MOESSBAUER EFFECT ♦ NANOSTRUCTURES ♦ PARTICLES ♦ POWDERS ♦ PYROLYSIS ♦ STRUCTURAL CHEMICAL ANALYSIS ♦ TEMPERATURE DEPENDENCE ♦ TRANSMISSION ELECTRON MICROSCOPY ♦ X-RAY DIFFRACTION ♦ CARBIDES ♦ CARBON COMPOUNDS ♦ CHEMICAL REACTIONS ♦ COHERENT SCATTERING ♦ DECOMPOSITION ♦ DIFFRACTION ♦ ELECTROMAGNETIC RADIATION ♦ ELECTRON MICROSCOPY ♦ ELEMENTS ♦ IRON ♦ IRON COMPOUNDS ♦ MATERIALS ♦ METALS ♦ MICROSCOPY ♦ MICROSTRUCTURE ♦ RADIATIONS ♦ SCATTERING ♦ SIZE ♦ THERMOCHEMICAL PROCESSES ♦ TRANSITION ELEMENT COMPOUNDS ♦ TRANSITION ELEMENTS
Abstract Fe-C) nanoparticles have been successfully synthesized using the laser pyrolysis method and variable nozzle geometries. At large nozzle diameters, XRD and SAED analysis clearly identified distinct {alpha}-Fe and Fe{sub 3}C phases. TEM and HRTEM indicated that these Fe-based nanoparticles have an average grain size of 3.5-10.2 nm. Temperature dependent Moessbauer spectra further confirm their distinct nanophases. By using a multi-step reduction procedure, Fe-C powders can be disaggregated into stable, water soluble nanoparticles.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2010-10-06
Publisher Place United States
Volume Number 1275
Issue Number 1


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