324 Int. J. Nanoparticles, Vol. 6, No. 4, 2013 Copyright © 2013 Inderscience Enterprises Ltd. Optical and magnetic properties of Fe-doped ZnO nanoparticles prepared by the sol-gel method Talaat M. Hammad* Physics Department, Al-Azhar University, P.O. Box 1244, Gaza, Palestine Fax: +9728-283180 E-mail: talaathammad@gmail.com *Corresponding author Stefan Griesing Experimental Physics, Saarland University, D-66123 Saarbrucken, Germany E-mail: s.griesing@mx.uni-saarland.de Matthias Wotocek, Sylvia Kuhn and Rolf Hempelmann Physical Chemistry, Saarland University, D-66123 Saarbrucken, Germany E-mail: m.wotocek@mx.uni-saarland.de E-mail: sylvia.kuhn@mx.uni-saarland.de E-mail: r.hempelmann@mx.uni-saarland.de Uwe Hartmann Experimental Physics, Saarland University, D-66123 Saarbrucken, Germany E-mail: u.hartmann@mx.uni-saarland.de Jamil K. Salem Chemistry Department, Al-Azhar University, P.O. Box 1244, Gaza, Palestine E-mail: jamils22@yahoo.com