Carbon nanotubes: dangerous when wet?

Caution: carbon nanotubes may be dangerous when wet. Nanotubes are hydrophobic, meaning they clump together in pure water rather than dispersing. This led to the belief that they would not spread out when released by factories into rivers and lakes. However, researchers at the Georgia Institute of Technology in Atlanta have shown this is not the case by comparing particle dispersion in filtered water and unfiltered water from Georgia’s Suwannee river. They found that when the tubes interact with decomposed plant and animal matter in the river water,
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