1. Department of Industrial Engineering; The Hashemite University; Zarqa Jordan
2. Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Universitätsstraße 15 Essen 45141 Germany
3. Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE); University of Duisburg-Essen; Lotharstraße 1 Duisburg 47057 Germany