Figure 3. Hydrogen bond structure of water molecules at the graphene-water interface observed by VSFG (IMAGE)
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The interface between water and one-layer graphene (left) is composed of water molecules with four hydrogen bonds (red) and water molecules with two hydrogen bonds (green). As the number of graphene layers increases, the number of water molecules with strong hydrogen bonds decreases, and the number of water molecules with weak hydrogen bonds increases. The IBS researchers found that when graphene is stacked up to four layers, the surface of the multilayer graphene film becomes hydrophobic, which induces an increase in the population of water molecules with dangling -OH groups.
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Institute for Basic Science
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