1. Advanced Materials and Thin Film Laboratory Department of Physics Alagappa University Karaikudi 630 003 India
2. Nano and computational materials laboratory Department of Industrial chemistry Alagappa University Karaikudi 630 003 India
3. Department of Physics TBML College Porayr 609 307 Tamil Nadu
4. Department of Physics Centralised Instrumentation and Services Laboratory Annamalai University, Ananamalai Nagar Chidambaram Tamil Nadu India