1. Centre for Research, Department of Physics, A A Government Arts College, Tiruchirapalli, India
2. Department of Physics, Bharathidasan University Constituent College, Tiruchirapalli, India
3. Department of Studies in Chemistry, Mangalore University, Mangalagangotri, India
4. Department of Physics, Srimad Andavan Arts and Science College, Tiruchirapalli, India