J. Mater. Sci. Technol. ›› 2007, Vol. 23 ›› Issue (02): 189-192.

• Research Articles • Previous Articles     Next Articles

A Comparative Study on the Selected Area Electron Diffraction Pattern of Fe Oxide/Au Core-shell Structured Nanoparticles

Qianghua LU, Kailun YAO, Dong XI, Zuli LIU, Xiaoping LUO, Qin NING   

  1. Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China...
  • Received:2006-03-03 Revised:2006-05-31 Online:2007-03-28 Published:2009-10-10
  • Contact: qianghua lu

Abstract:

The selected area electron diffraction (SAED) pattern of magnetic iron oxide core/gold shell nanoparticles has been studied. For the composite particles with mean size less than 10 nm, their SAED pattern is found to be different from either the pattern of pure Fe oxide nanoparticles or that of pure Au particles. Based on the fact that the ring diameters of these composite particles fit the characteristic relation for the fcc structure, the Au atoms on surfaces of the concerned particles are supposed to pack in a way more tightly than they usually do in pure Au nanoparticles. The driving force for this is the coherency strain which enables the shell material at the heterostructured interface to adapt the lattice parameters of the core.

Key words: Core-shell structured nanoparticles, Magnetic Fe oxide, Selected area electron diffraction...