1. Department of Physics University of Kerala, Kariavattom Thiruvananthapuram 695581 India
2. Chemical Sciences and Technology division CSIR -National Institute of Interdisciplinary Sciences (CSIR-NIIST) Thiruvananthapuram Kerala India 695019
3. Thomas Jefferson University Philadelphia Pennsylvani, NJ 08096 United States
4. Department of Biochemistry and Molecular Biology School of Biological Sciences Central University of Kerala Kasargod 671314 India
5. Department of Nanoscience and Nanotechnology University of Kerala, Kariavattom Thiruvananthapuram 695581 India
6. Materials Science and Technology division CSIR- National Institute of Interdisciplinary Sciences (CSIR-NIIST) Thiruvananthapuram Kerala India 695019