| abstract |
The invention provides homogenous dispersions of luminescent silicon nanoparticles in organoslicoon compounds, fatty acids and oils. In methods of the invention, a fatty acid or oil and silicon nanoparticle homogenous dispersion is formed by mixing. The dispersion of nanoparticles in organosilicon compounds, fatty acid(s) or oil(s) can used as a delivery mechanism to homogenously incorporate the nanoparticles into a variety of cosmetic compounds and oils, such as foundation creams and other make-up products, sun tan lotions, sun tan oils, etc. Compounds of the invention with homogenous nanoparticle dispersions display homogeneous UV/blue absorption as well as down conversion to visible luminescence. The compounds can be tailored to exhibit white luminescence under UV illumination. Preferred skin care compounds provide a pleasing cosmetic effect in response to light. Preferred skin care compounds also provide uv protection. |