Table of Contents
International Journal of Spectroscopy
Volume 2012, Article ID 371092, 4 pages
Research Article

Analysis on Binding Energy and Auger Parameter for Estimating Size and Stoichiometry of ZnO Nanorods

1Water and Steam Chemistry Division, BARC Facilities, Kalpakkam 603 102, India
2Surface and Nanoscience Division, IGCAR, Kalpakkam 603 102, India

Received 26 May 2011; Revised 24 June 2011; Accepted 9 August 2011

Academic Editor: Alexander Milekhin

Copyright © 2012 Santanu Bera 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.


ZnO nanorods prepared through chemical vapor deposition technique are characterized by microscopic and X-ray photoelectron spectroscopy (XPS) techniques to correlate the effects of size on the binding energy of Zn 2p3/2 photoelectrons. A positive shift in Zn 2p3/2-binding energy as compared to that in bulk ZnO is assumed to be the effect of size of ZnO tips. The shift in binding energy has been explained in terms of relaxation energy in the photoemission process. Simultaneously, Auger parameter of the nanorods is evaluated for stoichiometric composition. The extra peak in O1s spectrum of nanorods is explained as adsorbed O-bearing species or surface contaminants.