1. Energy Conversion and Storage Research Section, Industrial Physics Division, Bangladesh Council of Scientific and Industrial Research, Dhaka 1205, Bangladesh
2. Department of Electrical and Electronic Engineering, University of Dhaka, Dhaka 1000, Bangladesh
3. Central Analytical and Research Facilities, Bangladesh Council of Scientific and Industrial Research, Dhaka 1205, Bangladesh
4. Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York, 12180 USA
5. Department of Physics, University of Dhaka, Dhaka 1000, Bangladesh
6. Biomedical and Toxicological Research Institute, Bangladesh Council of Scientific and Industrial Research, Dhaka 1205, Bangladesh
7. Materials Science Division, Atomic Energy Centre, Dhaka 1000, Bangladesh