Nanodiamond UV protectant formulations

A sunscreen preparation comprising:

• a dispersion of an effective amount of diamond nanoparticle aggregates, wherein a plurality of the diamond nanoparticle aggregates have a size greater than about 60 nm and less than about 1 micron,
• the concentration of the diamond nanoparticle aggregates comprises between about 0.1 and 10 percent by weight,
• the diamond nanoparticle aggregates provide attenuation of ultraviolet radiation having a wavelength between about 190 and 400 nm, and
• diamond nanoparticles comprising the aggregates are produced by a detonation process.

A cosmetic or sunscreen preparation comprising:

• a dispersion of an effective amount of diamond nanoparticles in a physiologically compatible medium, wherein
• the diamond nanoparticles provide ultraviolet radiation attenuating properties for ultraviolet radiation having a wavelength between about 190 and 400 nm, and
• the diamond nanoparticles comprise primary detonation nanodiamond particles of about 3 to 5 nm in size,
• wherein a plurality of the diamond nanoparticles have been modified to enhance absorption of UV radiation compared to their unmodified state.

A cosmetic or sunscreen preparation comprising:

• a dispersion of an effective amount of diamond nanoparticle aggregates in a physiologically compatible medium, wherein
• a plurality of the diamond nanoparticle aggregates have a size greater than about 60 nm and less than about 1 micron,
• the diamond nanoparticle aggregates provide ultraviolet radiation attenuating properties for ultraviolet radiation having a wavelength between about 190 and 400 nm, and
• diamond nanoparticles comprising the aggregates are produced by a shock wave conversion of graphite.