1. Physics Department, Faculty of Science, Taibah University, Almadinah Almunawarrah 42353, Saudi Arabia
2. Flinders Institute for Nanoscale Science and Technology, College of Science and Engineering, Flinders University, Adelaide SA 5001, Australia
3. Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, QLD 4111, Australia
4. School of Engineering and Built Environment, Griffith University, Nathan, QLD 4111, Australia