1. Department of Physics, St. Mary’s Engineering College, Hyderabad, India
2. Department of Physics, SSBN Degree College, S.K. University, Anantapur, India
3. Department of Chemistry, J.K.C.College, Acharya Nagarjuna University, Guntur, India
4. Department of Chemistry, Dr.APJ Abdul Kalam, RGUKT, IIIT, Ongole, India