Synthesis of pure iron magnetic nanoparticles in large quantity

Tiwary, CS and Kashyap, S and Biswas, K and Chattopadhyay, K (2013) Synthesis of pure iron magnetic nanoparticles in large quantity. In: Journal of Physics D: Applied Physics, 46 (38). 385001_1-385001_6.

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Abstract

Free nanoparticles of iron (Fe) and their colloids with high saturation magnetization are in demand for medical and microfluidic applications. However, the oxide layer that forms during processing has made such synthesis a formidable challenge. Lowering the synthesis temperature decreases rate of oxidation and hence provides a new way of producing pure metallic nanoparticles prone to oxidation in bulk amount (large quantity). In this paper we have proposed a methodology that is designed with the knowledge of thermodynamic imperatives of oxidation to obtain almost oxygen-free iron nanoparticles, with or without any organic capping by controlled milling at low temperatures in a specially designed high-energy ball mill with the possibility of bulk production. The particles can be ultrasonicated to produce colloids and can be bio-capped to produce transparent solution. The magnetic properties of these nanoparticles confirm their superiority for possible biomedical and other applications.

Item Type:	Journal Article
Publication:	Journal of Physics D: Applied Physics
Publisher:	IOP Publishing Ltd
Additional Information:	Copyright of this article belongs to IOP Publishing Ltd.
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	25 Oct 2013 05:31
Last Modified:	25 Oct 2013 05:31
URI:	http://eprints.iisc.ac.in/id/eprint/47537

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