Just remember, in 1973, we had no digital cameras, no personal computers, no Internet. The thought of putting a billion transistors in a cell phone was ludicrous.

I have nothing against investment banking, but it's like massaging money rather than creating money. If you're in physics, you create inventions, you create lasers, you create transistors, computers, GPS.

Carbon nanotubes are amazing because they're really good electrical conductors, yet they are only a few atoms in diameter. You can make transistors out of them in the same way you can with silicon. At Berkeley, we made the narrowest device anybody had ever made. It was basically a single molecule.