Assemble the carbon nanotubes

People the world over need clean drinking water safe from impurities and pollution. However, many existing filtration techniques are expensive and require lots of energy.

Now researchers at Lawrence Livermore National Laboratory have created a filter made of carbon nanotubes—sheets of carbon rolled into tubes 50,000 times thinner than a human hair—that could help make clean drinking water accessible to everyone. Billions of nanotubes are the pores in the membrane: the super-smooth, straight insides of the tubes let water molecules slip through easily and quickly, while the tiny pore size keeps out impurities.

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