US Patent 7648765 - Carbon nanoparticle dispersion

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Nanodiamonds have a high refractive index and transparency making them useful for optical applications and also possess a high hardness making them useful for mechanical polishing. This patent from Futaba Corporation teaches a way to create a dispersion of nanodiamonds in an organic solvent. Claim 1 reads:

1. A dispersion of carbon nanoparticles, prepared by monodispersing carbon nanoparticles in water droplets of a reverse micelle solution in which the water droplets are coated with amphiphilic molecules and dispersed in an organic solvent, wherein a monodispersion function material is added to the reverse micelle solution, and the monodispersion function material is an electrolyte.