President-elect Barack Obama's image looms larger than ever in the media these days, but now his face has been rendered in 3-D portraits smaller than a grain of salt, using nanotechnology.
The mini-Barack Obamas were made by John Hart, an engineering professor at the University of Michigan, who dubbed them "nanobamas."
Each nanobama contains about 150 million carbon nanotubes stacked vertically like trees in a forest. A carbon nanotube is an extraordinarily strong hollow cylinder about 1/50,000th the width of a human hair.
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