Table of Contents Author Guidelines Submit a Manuscript
Journal of Nanomaterials
Volume 2012, Article ID 758429, 4 pages
http://dx.doi.org/10.1155/2012/758429
Research Article

Synchrotron X-Ray Absorption Spectroscopy Study of Self-Assembled Nanoparticles Synthesized from Fe(acac)3 and Pt(acac)2

1Molecular Technology Research Unit, School of Science, Walailak University, Nakhon Si Thammarat 80161, Thailand
2School of Ceramic Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand
3School of Physics, Institute of Science, Suranaree University of Technology and Synchrotron Light Research Institute (Public Organization), Nakhon Ratchasima 30000, Thailand

Received 30 May 2011; Accepted 1 July 2011

Academic Editor: Linbao Luo

Copyright © 2012 K. Chokprasombat et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The synchrotron X-ray absorption technique was used to complement electron microscopy in the investigation of nanoparticles synthesized from the coreduction of iron acetylacetonate, Fe(acac)3 and platinum acetylacetonate, Pt(acac)2. A much higher Pt composition than Fe leads to an extended X-ray absorption fine structure (EXAFS) spectrum for the sample that differs from that of fcc FePt nanoparticles. Most importantly, X-ray absorption near-edge structure (XANES) spectra clearly indicate the existence of α-Fe2O3 and Pt metal. Since these monodisperse nanoparticles have a diameter of around 4 nm and tend to self-assemble into hexagonal arrangements, they can be modeled as Pt-rich cores with an α-Fe2O3 shell stabilized by organic surfactants.