| Abstrakt: |
The surge in the incidence of skin cancer caused by UV exposure in Yemen served as the impetus for the current study. Fixed volumes and concentrations of both propolis aqueous extract and zinc salt solution were reacted to form zinc oxide (ZnO) nanoparticles at various temperatures (25, 35, 50, 65, 75, and 90 °C) and at a constant pH. The characteristics of the nanostructure and the degree of deformation that took place inside the nanoparticles were determined (for example, microstrain, stacking fault, surface stress, porosity, etc.). The optical parameters that affect the estimation of the blocking ultraviolet radiation parameters, such as the absorption coefficient, extinction coefficient, skin depth, refractive index, energy gap, Urbach energy, and optical conductivity, were calculated. The best results obtained in blocking ultraviolet radiation (A and B) were 81% and 75% for the sample that was prepared at 75 °C, respectively. Based on scientific methodology, empirical data, and exact equations, the results were interpreted within the nanoscale structure. [ABSTRACT FROM AUTHOR] |
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