1. Light Scattering Lab, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India
2. Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
3. Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore 560012, India
4. Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India