1. Department of Physics , Noorul Islam Centre for Higher Education , Kumaracoil 629180 Tamil Nadu , India
2. School of Chemical Engineering, Yeungnam University , 280 Daehak-Ro, 38541 , Gyeongsan , South Korea
3. Department of Botany and Microbiology, College of Science, King Saud University , P. O. Box 2455 , Riyadh 11451 , Saudi Arabia