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Graphene: The Future of Desalination? 

Seawater on the left, consisting of water molecules (red and white) and sodium and chlorine (salt) ions (green and purple), is forced through a single-atom-thick sheet of graphene having pores between 0.7 and 0.9 nanometers in diameter. The water molecules pass through to the right, while the larger salt ions are blocked.

Image credit: Image by David Cohen-Tanugi and Jeffrey Grossman. Creative Commons

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