Sung-Jin Cho et al 2006 Nanotechnology 17 640 doi:10.1088/0957-4484/17/3/004
Sung-Jin Cho1, Benjamin R Jarrett2, Angelique Y Louie2,3 and Susan M Kauzlarich1,3
Show affiliationsCore/shell structured iron(Fe)/gold(Au) nanoparticles have been prepared by a reverse micelle method, and their potential application as magnetic resonance (MR) contrast agent investigated. The average nanoparticle size is 19 nm, as determined by x-ray powder diffraction (XRD) and transmission electron microscopy (TEM). Magnetic properties and relaxivities of nanoparticles are presented and compared. The saturation magnetization is 81 emu g−1 Fe for freshly prepared nanoparticles and the particles have high r1(6.87 mM−1 s−1) when the Fe core is kept from oxidation. These nanoparticles may be used as T1 agents in the unoxidized form.
75.50.Tt Fine-particle systems; nanocrystalline materials
75.30.Cr Saturation moments and magnetic susceptibilities
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
Issue 3 (14 February 2006)
Received 9 August 2005, in final form 21 November 2005
Published 6 January 2006
Sung-Jin Cho et al 2006 Nanotechnology 17 640
A K M M Haque and I A M Al-affan 1987 Phys. Med. Biol. 32 1001
N Zhang and Z C Zheng 2007 J. Phys. D: Appl. Phys. 40 2603
D J Crotty et al 2007 Phys. Med. Biol. 52 603
Dan A Allwood et al 2009 Phys. Educ. 44 627
L Wiesenfeld et al 2003 J. Phys. B: At. Mol. Opt. Phys. 36 1319
I Moreno et al 2005 Eur. J. Phys. 26 261
E Romero et al 2009 Physiol. Meas. 30 R35
Martin S Judenhofer et al 2005 Phys. Med. Biol. 50 29
W G Chadband 1991 J. Phys. D: Appl. Phys. 24 56