| abstract |
(57) [Summary] [Structure] Composite fine particles composed of mother particles in which primary particles are aggregated while maintaining their shape, and child particles dispersed and fixed in the mother particles. Having a bandgap energy smaller than that of the particles constituting the mother particles and having an ultraviolet absorbing ability, an ultraviolet-shielding composite fine particle having transparency in the visible light region, and a method for producing the same. And a cosmetic containing the composite fine particles. [Effect] The composite fine particles of the present invention are optical particles of ultrafine particles having high transparency in the visible light region and high shielding property in the ultraviolet light region, by converting the ultrafine particles having the ultraviolet shielding ability into the composite fine particles. It is characterized by stable expression of properties. The cosmetic of the present invention containing the composite fine particles is a cosmetic having excellent transparency and a high ultraviolet shielding effect. |