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
B Willke et al 2002 Class. Quantum Grav. 19 1377
A N F Aleixo et al 2001 J. Phys. A: Math. Gen. 34 1109
K Tennakone and W G D Dharmaratna 1983 J. Phys. D: Appl. Phys. 16 855
B. Cichocki et al 2004 Europhys. Lett. 67 383
G Date 2003 Class. Quantum Grav. 20 303
G J Ackland et al 1997 J. Phys.: Condens. Matter 9 7861
Lars Andersson et al 2004 Class. Quantum Grav. 21 S29
Pia Astone et al 2002 Class. Quantum Grav. 19 1443
John W Norbury 1989 Eur. J. Phys. 10 237