Study of blue shift in Iron (Fe) doped ZnO Nanoparticles at different Molarities by Wet Chemical Method

Abstract

Iron (Fe) doped Zinc Oxide (ZnO) nanoparticle is a very important topic of study in the field of nanoscience and nanotechnology. We have prepared Iron doped ZnO nanoparticles by Wet chemical method. We report the optical properties of Iron (Fe) doped ZnO nanoparticles at different molarities (0.025M, 0.05M and 0.1M). The band gaps of all nanoparticles prepared at different molarities are calculated with the intercept on Y-axis of Tauc plot from UV absorption spectra using UV-Vis Absorption spectroscopy. It has been observed that band gap decreases as the molarity increases. At 0.025M, 0.05M and 0.1M band gap are found to be 4.9eV, 4.89eV and 2.7eV respectively. This reduction in band gap suggest that the band gap of prepared nanoparticles are shifted towards lower energy. This shifting in band gap the blue region gives the idea of blue shift quite well. This blue shift is dependent on the particle size of the nanoparticles.

Estimation of ground and excited state dipole moments of newly synthesized coumarin molecule by Solvatochromic shift method and Gaussian software

“…Using different methods many researchers worked on the ground and excited state dipole moments by experimentally and theoretically for coumarins, fluorescent molecules, organic dyes and laser dyes [4][5][6][7][8][9]. We observed there is a blue shift in Iron doped ZnO nanoparticles at different molarities by Wet Chemical Method [20]. However, there are no reports available in the literature on the estimation of ground and excited state dipole moment values of the coumarin molecule 4-((3-methoxyphenoxy)methyl)-7-hydroxy-2H-chromen-2-one .…”