When A Good Nanoparticle Goes Bad: Well, now that's the story of my life. I AM that nanoparticle.
Actually, it's more about detecting which nanoscale gold particles are good catalysts and which suddenly go bad. Separating good from evil will help create better fuel cells or more efficient cars.
You can't start the energy revolution without a nanoscale spark. All it takes are a few good particles.
As for the bad ones ... throw away the key.