1. Division of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16 C, Stockholm SE-10691, Sweden
2. Department of Chemistry, Faculty of Science, Assiut University, Assiut 71515, Egypt
3. Nanotechnology Research Centre (NTRC), The British University in Egypt (BUE), Suez Desert Road, P.O. Box 43, El-Shorouk City 11837, Cairo, Egypt
4. Wallenberg Wood Science Center, Teknikringen 56-58, Stockholm 100 44, Sweden