I recently got a solid state nebulizer for a medical application.
It is small, quiet, and quickly makes a dense fog of regular aqueous solutions.
It appears to make a monodisperse fog something like 2 microns in diameter at about 1m//min.
It stricks me that this would be a superb way of making small quantities of nanoparticles from anything that can be put into non-acidic solution.
Make the fog, dry, & calcine it as it is drawn through a tube.
I suppose people already do this?
The device I'm using is an AeroNeb nebuliser by AeroGen Inc.
Dave