By combining first-principles calculations with Mie theory,the radiative properties of micrometer-scale Ag2O particles are theoretically calculated to analyze the impact of the size pa-rameter on their radiative characteristics.The results show that the incident light wavelength of approximately 0.5 μm is the active region for electrons and a significant absorption region for Ag2O particles.When the incident light wavelength is 1.2 μm,the radiative properties of Ag2O particles exhibit oscillatory changes with the increase of the size parameter,and the oscillation of the scattering phase function intensifies with the increase of the size parameter,approaching geo-metric scattering at a size parameter of 15.At the same incident light wavelength,both the extinc-tion and scattering coefficients of Ag2O particles increase rapidly and then slowly decrease with the increase of particle size.For a non-uniform(fv=0.2)Ag2O particle system,the extinction cross-section is greater than the scattering cross-section,and overall,both the extinction and scattering cross-sections decrease with the increase of the incident light wavelength.The scattering phase function exhibits significant forward scattering at shorter incident wavelengths and becomes uni-formly distributed as the incident wavelength increases.
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