Abstract
In this study, a new theoretical method for the estimation of absorption and fluorescence spectra is accomplished. These estimations were established following experimental measurements of absorption and fluorescence spectra for the solutions of fluorescein laser dye mixed with titanium dioxide (TiO2) nanoparticlesin distilled water. The used concentration of fluorescein dye was 1x10-5 M, whereas the masses of titanium dioxide nanoparticles were 0.0003g, 0.0005g, 0.001g and 0.002g. An absorption spectra improvement was observed upon raising the mass of TiO2 nanoparticles, which specifies that doping the fluorescein dye with TiO2 nanoparticles have an essential influence on the dye absorption spectra. On the other side, all fluorescence spectra for the dye quenched as TiO2 nanoparticles mass was increased, because of the induced electron transfer. The new method of theoretical estimations was based on curve fitting using Logistic Power Peak (LPP) function to estimate theoretical models for the absorption and fluorescence spectra of thesesamples. The results revealed that these estimated models had exceptional matching shapes with the experimental shapes, so that the estimated models can substitute the experimental measurements.
Highlights
Various spectral analyses of the absorption and fluorescence emissions of xanthene dyes were achieved, which included the doping of metal and non-metal nanoparticles in dye liquids
Fluorescence quenching by electron transfer effects was inspected for nanoparticles with organic dyes by Asiri et al [8], who explained the photodegradation of rhodamine 6G and phenol red by TiO2 nanoparticles through electron transfer under solar irradiation
A new method for creating theoretical models in order to estimate the spectral performance of the fluorescein dye with TiO2 nanoparticles was evaluated. These estimations were performed after experimental measurements of absorption and fluorescence spectra of fluorescein dye with TiO2 nanoparticles of different masses
Summary
Various spectral analyses of the absorption and fluorescence emissions of xanthene dyes (especially fluorescein) were achieved, which included the doping of metal and non-metal nanoparticles in dye liquids. A new method for creating theoretical models in order to estimate the spectral performance of the fluorescein dye with TiO2 nanoparticles was evaluated. These estimations were performed after experimental measurements of absorption and fluorescence spectra of fluorescein dye with TiO2 nanoparticles of different masses.
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