By a News Reporter-Staff News Editor at Life Science Weekly -- Investigators publish new report on Chalcogens. According to news originating from Espoo, Finland, by NewsRx correspondents, research stated, "In the present study, iron oxide nanoparticles (primary particle size of 80-90 nm) with controlled oxidation state were prepared via an atmospheric pressure chemical vapour synthesis (APCVS) method. Iron pentacarbonyl [Fe(CO)(5)], a precursor material, was thermally decomposed to iron in the APCVS reactor."
Our news journalists obtained a quote from the research from VTT Technical Research Center, "Subsequently, the iron was oxidized with controlled amount of oxygen in the reactor to produce nearly pure magnetite or haematite particles depending on the oxygen concentration. Size, morphology and crystal structure of the synthesized nanoparticles were studied with scanning mobility particle sizer (SMPS), transmission electron microscopy (TEM) and X-ray diffraction (XRD). In addition, thermodynamic equilibrium calculations and computational fluid dynamics model were used to predict the oxidation state of the iron oxides and the reaction conditions during mixing. Aggregates of crystalline particles were formed, determined as magnetite at the oxygen volumetric fraction of 0.1 % and haematite at volumetric fraction of 0.5 %, according to the XRD. The geometric mean electrical mobility diameter of the aggregates increased from 110 to 155 nm when the volumetric fraction of oxygen increased from 0.1 to 0.5 %, determined using the SMPS. The aggregates were highly sintered based on TEM analyses."
According to the news editors, the research concluded: "As a conclusion, APCVS method can be used to produce nearly pure crystalline magnetite or haematite nanoparticles with controlled oxidation in a continuous one-stage gas-phase process."
For more information on this research see: Controlled oxidation of iron nanoparticles in chemical vapour synthesis. Journal of Nanoparticle Research, 2014;16(2):1-11. Journal of Nanoparticle Research can be contacted at: Springer, Van Godewijckstraat 30, 3311 Gz Dordrecht, Netherlands. (Springer - www.springer.com; Journal of Nanoparticle Research - www.springerlink.com/content/1388-0764/)
The news correspondents report that additional information may be obtained from J. Ruusunen, VTT Technical Res Center Finland, Espoo 02044, Finland. Additional authors for this research include M. Ihalainen, T. Koponen, T. Torvela, M. Tenho, J. Salonen, O. Sippula, J. Joutsensaari, J. Jokiniemi and A. Lahde (see also Chalcogens).
Keywords for this news article include: Espoo, Europe, Finland, Chalcogens, Nanoparticle, Nanotechnology, Emerging Technologies
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