Gas-Phase Flame Synthesis and Characterization of Iron Oxide Nanoparticles for Use in a Health Effects Study
Titel:
Gas-Phase Flame Synthesis and Characterization of Iron Oxide Nanoparticles for Use in a Health Effects Study
Auteur:
Guo, Bing Kennedy, Ian M.
Verschenen in:
Aerosol science and technology
Paginering:
Jaargang 41 (2007) nr. 10 pagina's 944-951
Jaar:
2007-10
Inhoud:
Iron oxide nanoparticles, to be used in a health effects study, were synthesized in a H2/air diffusion flame and characterized by transmission electron microscopy, X-ray diffraction, surface area measurement, inductively coupled plasma mass spectrometry, and a spectrophotometric speciation method. The nanoparticles exhibited the maghemite (γ -Fe2O3) crystal structure and contained only trivalent iron. There were two size modes in the particles. The large size mode contained crystalline, non-agglomerated particles with a median diameter of approximately 45 nm; the small size mode contained particles that were in the size range of 3-8 nm and were mostly amorphous. Depending on the value taken for the small particle size, the small mode accounted for 73-82% of the particle surface area. The particles in the small size mode were likely formed from the vapor of FeO and Fe.
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