"Picture pictures of Obama using nano carbon tubes"

President-elect Barack Obama is larger than life these days. Except, that is, at the University of Michigan, where he has become remarkably small.A team of researchers has created carbon nanotube images of Obama whose details can only be seen with optical and electron microscopes.Each of the millions of hollow carbon cylinders that make up the incoming president's image is tens of thousands times smaller than a human hair, but stronger than steel.
Patterns arranged in the shapes of Obama face are made of metal catalyst nanoparticles. The nanotubes are "grown" like forests of trees on the patterns by 1,000 degree-plus heat in a chemical reaction.
The images include a "nanobama" flag and "nanobama" blocks. There's even a "nanobiden" image of the incoming vice president, Joe Biden.
Practical applications for the field of study include improving health care, energy and even military weapons.
At Boise State University and elsewhere, researchers have said they used emerging nanotechnology techniques to devise a way to kill cancer cells while leaving normal cells healthy.

How did they do this?