1. Chemistry and Structure of Novel Materials, Department of Chemistry and Biology, University of Siegen, Paul-Bonatz-Str. 9-11, 57076 Siegen, Germany
2. Faculty of Materials Engineering, Sahand University of Technology, P.O. Box 51335-1996 Tabriz, Iran
3. Debye Institute for Nanomaterials Science, Universiteit Utrecht, Princetonplein 5, NL 3548CC, Utrecht, The Netherlands
4. Mechanical Engineering, University of Siegen, Paul-Bonatz-Str. 9-11, 57076 Siegen, Germany
5. Department of Chemical and Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, T6G 1H9 Alberta, Canada