You may have to sift through the literature. The most recent info would be conference proceedings and in-house R&D.
Technanogy makes nano aluminum. This is useful as an additive to solid propellant as it promotes a more aggressive and complete burn.
Materials Modification, where I work, has made a wide range of nano-powders such as cobalt, and SiC and ZnO. The applications include the fabrication of wear resistant material with substantially improved fracture toughness.
We have also done good development on consolidation of these powders into bulk materials while preserving fine microstructure.
Other nano-powders include fumed silica, which is used for electrical stabilization of polymers and modification of polymer rheology. Carbon black is used for black pigments, for making polymers ESD-safe and for other composite functions.