1. Department of Material and Environmental Chemistry Stockholm University Stockholm SE‐10691 Sweden
2. Advanced Multifunctional Materials Laboratory, Department of Chemistry, Faculty of Science Assiut University 71516 Assiut Egypt
3. Nanotechnology Research Centre (NTRC) The British University in Egypt El‐Shorouk City, Suez Desert Road, P.O. Box 43 Cairo 11837 Egypt