Tiny Toothbrush Can Clean Capillaries

Scientists have developed a microscopic toothbrush that is so small that it can clean the inside of a cappilary. The brush is made of carbon nanotubes, and can even paint the internals of a cappilary. Most paintbrushes are made of thin metal or animal hair, but carbon nanotubes provide the best of both worlds:

Carbon nanotubes, on the other hand, are 30 times stronger than steel, yet five times less dense. They are highly elastic, resistant to heat, have large surface areas and even conduct electricity. The latter property makes them highly suitable for the contact brushes used in electric motors, says Ajayan.

Read More | New Scientist