1. Department of Electronics and Communication Engineering, Government Engineering College Barton Hill, Trivandrum 695035, India
2. APJ Abdul Kalam Technological University, Trivandrum 695017, India
3. Center for Nanomaterials and Devices, RV College of Engineering, Bengaluru 560059, India
4. Department of Chemistry, RV College of Engineering, Bengaluru 560059, India
5. Department of Physics, RV College of Engineering, Bengaluru 560059, India
6. Department of Electronics and Communication Engineering, College of Engineering, Trivandrum 695016, India
7. School of Advanced Materials and Nanotechnology, Xidian University, Xi’an 710071, China
8. Department of Mechanical Systems Engineering, Yamagata University, Yonezawa 990-8560, Japan