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Title: Synthesis, structural, magnetic, and cytotoxic properties of iron oxide coated iron/iron-carbide nanocomposite particles
Authors: Yu, S. 
Chow, G.M. 
Issue Date: 2005
Citation: Yu, S., Chow, G.M. (2005). Synthesis, structural, magnetic, and cytotoxic properties of iron oxide coated iron/iron-carbide nanocomposite particles. Journal of Applied Physics 98 (11) : -. ScholarBank@NUS Repository.
Abstract: Iron/iron-carbide nanocomposite particles with surface coating of spinel iron oxide were synthesized by thermal decomposition of iron pentacarbonyl [Fe(CO) 5] in various atmospheres of argon, methane, and acetylene at a temperature of 257 °C. The microstructure, composition, magnetic properties, thermal stability of as-synthesized particles, and the effects of subsequent heat treatment were investigated. The synthesized nanoparticles exhibited a maximum magnetization of 160 emug, which was twice that of commonly used spinel iron oxide nanoparticles. After heating in an acidic solution with a pH value of 5 at 60 °C for 20 h, the nanocomposite particles retained 90% of their initial magnetization. In addition, x-ray diffraction and Mössbauer investigation indicated that the pyrolysis of Fe(CO) 5 under different atmospheres resulted in the formation of crystalline iron carbide. It is noted that only Fe was reported to be formed in the literature using the pyrolysis of Fe(CO) 5 under an argon atmosphere. Preliminary cytotoxicity assay suggested that the synthesized nanoparticles had comparable biocompatibility to γ - Fe2 O3. © 2005 American Institute of Physics.
Source Title: Journal of Applied Physics
ISSN: 00218979
DOI: 10.1063/1.2138375
Appears in Collections:Staff Publications

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