Synthesis and Properties of Magnetite Nanoparticles Coated with Poly(ethylene glycol) and Poly(ethylene imine)
Water-soluble magnetite nanoparticles were synthesized by thermal decomposition of iron(III) acetylacetonate in poly(ethylene glycol) in the presence of poly(ethylene imine). The amount of poly(ethylene imine), the reaction temperature and time are found to have significant effects
on the shape evolution and size distribution of the magnetite nanoparticles. The prepared magnetite nanoparticles show superparamagnetic behavior at 300 K. Coated with poly(ethylene glycol) and poly(ethylene imine) the magnetite nanoparticles are positively charged and highly soluble in deionized
water with small hydrodynamic size, and show longer time dispersion in water except the magnetite nanoparticles prepared with insufficient amount of poly(ethylene imine).
Document Type: Research Article
Publication date: 01 October 2013
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