I don't really understand these "nanoparticles" being touted as additives to products. Are they just...molecules added to increase the functionality of the product? In that case, would iodine be an "nanoparticle" added to salt? Is fluoride a "nanoparticle" added to drinking water?
I guess I tend to think of nanoparticles more in a Drexlerian sense.
Or are people just trying to make money off the word "nano?"