Water Dispersible Fe/Fe-Oxide Core-Shell Structured Nanoparticles for Potential Biomedical Applications

Dept. of Phys. & Astron., Univ. of Delaware, Newark, DE, USA
IEEE Transactions on Magnetics (Impact Factor: 1.21). 11/2009; DOI: 10.1109/TMAG.2009.2026629
Source: IEEE Xplore

ABSTRACT In this paper, we report the synthesis and characterization of water dispersible core-shell structured Fe/Fe-oxide with average size 13 plusmn1.4 nm and Fe-oxide nanoparticles. Unlike the previously reported different approaches, both types of particles can be synthesized by following the same route with a small variation in the Fe(CO)5 molar concentration and oxygen free environments. The oleate/oleylamine coated nanoparticles were surface modified with tetra-methyl-ammonium-hydroxide (TMAOH) to make them water dispersible. TGA analysis provided direct evidence that TMAOH adds to the surface of the oleic acid and oleylamine coated particles making them well disperse and stable in water as is suggested from the zeta potential measurements also.

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    • "The unique physical and chemical characteristics of nano-scale materials have led to a recent expansion in the production of engineered nanomaterials. For example, synthetic Fe oxide NPs have a variety of industrial applications (Beker et al., 2010; Pham et al., 2008; Khurshid et al., 2009), with hematite NPs in particular used in pigments, magnetic bioseparation in biotechnology, and lithium-ion batteries (Wang et al., 2005; Park et al., 2007; Zeng et al., 2008). Consequently , anthropogenic NPs are released into the environment during production, handling, use, and disposal; there has been a concomitant increase of interest in the effects of NPs on the environment and the pollution risks to environmental quality (Darlington et al., 2009; Kaegi et al., 2010; Nowack et al., 2012). "
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