ZnO nanostructures were grown for various pH values on Coming 7059 by aqueous chemical growth (ACG) using an equimolar aqueous solution of Zn(NO3)(2)center dot 6H(2)O (zinc nitrate hexahydrate) and C6H12N4 (HMTA; hexamethylenetetramine). It was indicated that the increasing of the PH of the solution significantly leads to a modification of the ZnO morphology from rod-like to prism-like and flower-like structures. (c) 2007 Published by Elsevier B.V.