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Nanoparticle Report

Iron Nanoparticle 
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Element 1: Iron
Structure: Spherical
Origin: Chemical Synthesis
PPMD: 90  nm
Added to NIL: 8/22/2005 6:39:00 AM
Contributor: Pratim   Biswas  ,   Washington University 

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Research Abstract:
Planar laser-based imaging measurements of fluorescence and particle scatteringhave been obtained during flame synthesis of iron-oxide/silica superparamagneticnanocomposites. The theory and application of laser-induced fluorescence, thespectroscopy of FeO(g), and the experimental approach for measurement of gas phaseprecursors to particle formation are discussed. The results show that the vapor phaseFeO concentration rapidly rises at the primary reaction front of the flame and is verysensitive to the amount of precursor added, suggesting nucleation-controlled particlegrowth. The FeO vapor concentration in the main nucleation zone was found to beinsensitive to the amount of silicon precursor injected, indicating that nucleation occurredindependently for the iron and silicon components. Light scattering measurements indicate that nanocomposite particles sinter faster than single component silica, in agreement with TEM measurements.  less info

Additional Particle Information 


B.K. McMillin, P. Biswas, and M.R. Zachariah, "In-Situ Characterization of Vapor-Phase Growth of Iron Oxide Silica Nanocomposites; Part I: 2-D Planar Laser Induced Fluorescence and MIE Imaging" J. Mat. Res. 11, 1552 ( 1996) 

Related Publications:
Almquist C. and Biswas P.: "Role of synthesis method and particle size of nanostructured titanium dioxide on its photoactivity", J. of Catalysis, vol. 212 (2), 145-156, 2002. Kulkarni P. and Biswas P. "Morphology of Nanostructured Films for Environmental Applications: Simulation of Simultaneous Sintering and Growth", J.of Nanoparticle Research, vol. 5 (3-4): 259-268, 2003. Biswas P., Choi M., Fissan H., Okuyama K., Pui D. and Schoonman, J. "International Symposium on ‘Nanoparticles: Aerosols more info
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