• CORRECTION: This story was updated on Jan. 20, 2015, to correct the image. The text incorrectly stated that the bottom row of photos shows stable graphene oxide films. The top row actually depicts the stable films. The image has been adjusted to match the caption.
Volume 93 Issue 2 | p. 4 | News of The Week
Issue Date: January 12, 2015 | Web Date: January 8, 2015

Why Graphene Oxide Thin Films Are Water Stable

Materials: Overlooked metal contamination strengthens membranes
Department: Science & Technology
News Channels: Materials SCENE, Nano SCENE, Analytical SCENE
Keywords: graphene, graphene oxide, membrane, water stable, water stability

The stability of graphene oxide films in water is crucial to their use as membranes for aqueous filtration and separation applications. That stability is also something of a mystery. In water, the films become negatively charged, so electrostatic repulsions ought to cause the films to disintegrate. Researchers have now shown that the membranes remain stable owing to metal ion contamination (Nat. Chem. 2015, DOI: . . .

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