1. Department of Physics, Gobi Arts & Science College, Gobichettipalayam, Erode 638453, India
2. School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
3. Department of Chemistry, Bannari Amman Institute of Technology, Sathyamangalam 638401, India
4. Sri Shanmugha College of Engineering and Technology, Pullipalayam, Salem 637304, India