1. Thin Films and Coatings Section, Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India
2. Novel Chemical Sensors Section, Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India
3. Department of Chemistry, Madras Christian College (Autonomous), Tambaram, Chennai 600059, India
4. Department of Physics, Loyola College (Autonomous), Nungambakkam, Chennai 600034, India