Adaptation and development in the optical and florescence features of PMMA-ZnMoO4 nanocomposites films
摘要
Poly(methylmethacrylate) (PMMA)-based nano-systems have gathered significant interest due to their distinctive features and extensive uses. This study created PMMA-wt% ZnMoO4 systems with different concentrations of ZnMoO4 using a straightforward and economical solution casting technique. Rietveld refinement analysis was utilized to determine the structure and microstructure of ZnMoO4 filler sample. The structure and morphology of PMMA/xwt%ZnMoO4 samples were observed via XRD and SEM techniques. The direct and indirect band gaps of loaded polymers diminished to their lowest values of 4.11 eV and 3.02 eV, respectively, with the incorporation of 5 wt% ZnMoO4 into PMMA. The refractive index values of the filled polymers are all greater than those of the pure PMMA polymer. The different dispersion parameters of the films were determine using Wemple–DiDomenico model. The values of Ed and Eo are 5.81 and 8.32 eV for the PMMA sample. The Eo value of PMMA was lowered/increased while Ed value was enhanced depended on the amount of ZnMoO4 doping. The no is 1.84 for PMMA and 2.49 for PMMA doped with 5.0 wt.% ZnMoO4. The polymer containing 5 wt% ZnMoO4 exhibited optimal dielectric constant and energy loss function values within the visible spectrum. The filled samples display raised nonlinear optical (NLO) parameters, making them appropriate for numerous uses in nonlinear optics and photonics. The refractive index and the nonlinear optical parameters based on direct and indirect optical band gaps for polymers were acquired using different empirical models. The effect of dopant concentration and excitation wavelength on the fluorescence data was explored. PMMA demonstrated violet or blue emission contingent upon the excitation wavelength. The filled samples demonstrated varying intensities of blue-violet-red, blue-violet, and violet hues under excitation wavelengths of 320, 380 and 435 nm, respectively.