1. Department of Physics; Manonmaniam Sundaranar University; Tirunelveli 627 012 India
2. Department of Biotechnology; Indian Institute of Technology Madras; Chennai 600 036 India
3. National Institute of Advanced Industrial Science and Technology (AIST); Molecular Profiling Research Center for Drug Discovery (molprof); Tokyo 135-0064 Japan
4. Department of Physics; Noorul Islam University; Kanyakumari 629 180 India