1. Research Scholar, Register Number: 11807, Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli, Tamil Nadu, India;
2. Department of Physics and Research Centre, Nesamony Memorial Christian College, Marthandam, India;
3. Department of Chemistry, Christian College, Kattakada, Thiruvananthapuram, Kerala, India;
4. Principal, NSS College Ottapalam, Palakad, Kerala, India;
5. Department of Physics, Centre for Molecular and Biophysics Research, Mar Ivanios College, Thiruvananthapuram, India