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Nano-materials are considered as a fundamental constituent in almost every field of medical science to engineering. However, the field of application of nano-material largely depends on its structural, chemical and optical properties of nano-material. Doping of nano-materials results in changes their particle size and band-gap which effects its applications. In this work, the effect of change in band-gap and particle size has been studied for 2nd group element doped ZnO (Zinc Oxide) nanostructures synthesized on AAO (Anode Aluminum Oxide) template having a pore size of 180.5 nm fabricated using chemical bath deposition and Anodization respectively. Fuzzy logic rule based system is used to study the effect of 2nd group element doping in ZnO nano-structure fabricated on AAO template with a fix pore size on the band-gap and output nanostructure. With addition of 2nd group element in ZnO nano-structure, a variation in rod length and band-gap has been observed. A decrease of rod length and an increase in band-gap have been observed by the addition of 2nd group including Be, Mg, Ca and Sr elements in ZnO nano-crystal. The fuzzy logic results are in accordance with the experimental system which shows the effectiveness of the simulations.

Due to rapid progressive research in the field of nano-technology, nanostructures are attaining tremendous deliberation. Precisely, among these, nano-fibers have accumulated unprecedented attention over the last few years owing to their superior properties such as large surface area to volume ratio. For advance generation solar cells, nano-fibers of metal oxides such as TiO _2 have been widely employed as a working anode but due to the disadvantages of recombination of electrons, their coupling with other metal oxides is necessary to render them useful. This work reports the successful fabrication of TiO _2 , TiO _2 /SnO _2 nano-fibers based film and study of the effect of polymer concentration upon it. The crystal structure of synthesized fibers was investigated using XRD, the morphology and chemical composition was analyzed using SEM and EDX, optical properties and chemical properties were studied using UV-VIS spectrophotometer and FT-IR while the electrical properties were studied using Hall Effect measurement system. It was revealed that the prepared TiO _2 -SnO _2 nano-fibers exhibit enhanced conductivity, larger band-gap with enhanced photo voltaic properties than TiO _2 nano-fibers. The prepared TiO _2 /SnO _2 nano-fibers based solar cells provide an improved efficiency of 4.81% as compared to 1.8% efficiency of bare TiO _2 nano-fibers.