  Optical properties of ZnO nanoparticles prepared from a simple chemical
method using sodium zincate bath show strong white light emission. X-ray
absorption fine structure studies reveal a completely different local
environment around Zn in these ZnO nanoparticles. The observed luminescence
properties and local structural changes have been explained on the basis of a
linkage between Zn and OH- ions in the surface layers of ZnO nanoparticles.
