Not so transparent - p865

doi:10.1038/nmat3773

As with the ongoing debate on the degree of wetting transparency of supported graphene, transparency in both pre- and post-publication peer review is a contentious concept.

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Wetting translucency of graphene - pp866–869

Chih-Jen Shih, Michael S. Strano and Daniel Blankschtein

doi:10.1038/nmat3760

For the case of water on supported graphene, about 30% of the van der Waals interactions between the water and the substrate are transmitted through the one-atom-thick layer.

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Wetting: Contact with what? - pp872–873

Ke Xu and James R. Heath

doi:10.1038/nmat3763

Pristine graphitic surfaces seem to be more hydrophilic than previously assumed because of the unexpected influence of the quick adsorption of hydrocarbons from air.

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Effect of airborne contaminants on the wettability of supported graphene and graphite - pp925–932

Zhiting Li, Yongjin Wang, Andrew Kozbial, Ganesh Shenoy, Feng Zhou, Rebecca McGinley, Patrick Ireland, Brittni Morganstein, Alyssa Kunkel, Sumedh P. Surwade, Lei Li and Haitao Liu

doi:10.1038/nmat3709

Contact-angle and spectroscopy experiments on clean supported graphene and graphite show that these surfaces become more hydrophobic as they adsorb airborne hydrocarbons. Furthermore, the water contact angle on these graphitic surfaces decreases if these contaminants are partially removed by both thermal annealing and controlled ultraviolet–ozone treatments, suggesting that graphitic surfaces are more hydrophilic than previously believed.

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