1. Experimental Physics Division, Atomic Energy Centre, 4, Kazi Nazrul Islam Avenue, Dhaka-1000, Bangladesh
2. Department of Chemistry, Faculty of Science, University of Dhaka, Dhaka-1000, Bangladesh
3. College of Science and Technology, Nihon University, 1-8-14 Kanda Surugadai, Chiyoda-ku, Tokyo 101-8308, Japan
4. Department of Physics, College of Science, Sultan Qaboos University, Muscat, Oman
5. Department of Physics, Faculty of Science, University of Dhaka, Dhaka-1000, Bangladesh
6. Department of Chemical Engineering, College of Engineering & King Abdullah Institute for Nanotechnology, King Saud University, P.O. Box 2455, Riyadh 11451, Kingdom of Saudi Arabia