Heating of single nanoparticles, their assemblies and ambient medium by solar radiation

摘要: Absorption of solar radiation by nanoparticles and their heating are applied in light-to-heat conversion, thermal devices, photocatalysis, cells, etc. The purpose this investigation is the modeling dynamics single homogeneous core–shell nanoparticles, assemblies surrounding medium (fluid) allowing to select parameters for effective applications. properties metallic (titanium Ti aurum Au) titanium core–its oxide shell (Ti–TiO2) with radii range 25–125 nm have been investigated spectral interval 200–2500 radiation. Novel temporal dependencies temperatures ambient under irradiation investigated. influence concentrations, sizes other on results established. Metallic Ti–TiO2 75–125 maximal values energetic \( q_{0} r_{0}^{2} \), q_{1} r_{1}^{2} \) optical P1 ≥ 1 can be used absorption nanofluids 200–1100 volumetric water absorber 1100–2500 surface absorbing layer water. Presented increase efficiency development novel working collectors. Selection suitable includes choice structure (homogeneous, core–shell, etc.), material (metal, oxide, size (their radii, thicknesses shells), concentrations simultaneous use appropriate realizing medium. These highlighting importance established remarkable approaches that improve current technologies near future.