1. Energy Harvest-Storage Research Center and Department of Physics, University of Ulsan, Ulsan 680-749 South Korea
2. Basic Science Department, Faculty of Industrial Education, Helwan University, Saray El-Quba, 11281 Cairo, Egypt
3. Department of Physics, Faculty of Science, Fayoum University, 63514 El Fayoum, Egypt
4. Center of Nano Science and Technology, Hanoi National University of Education, 122000, Hanoi, Vietnam