Affiliation: | 1. Department of Physics, M. B. B. College, , Agartala, Tripura, 799 004 India;2. Department of Chemistry, Bengal Engineering and Science University, , Howrah, 711 103 India;3. Department of Physics, Tripura University, , Suryamaninagar, Tripura, 799 022 India;4. Department of Chemistry, Tripura University, , Suryamaninagar, Tripura, 799 022 India |