Effect of airborne contaminants on the wettability of supported graphene and graphite.

@article{Li2013EffectOA,
  title={Effect of airborne contaminants on the wettability of supported graphene and graphite.},
  author={Zhiting Li and Yong-jin Wang and Andrew Kozbial and Ganesh Jagadeesh Shenoy and Feng Zhou and Rebecca McGinley and Patrick Ireland and Brittni Morganstein and Alyssa Kunkel and Sumedh P. Surwade and Lei Li and Hai-tao Liu},
  journal={Nature materials},
  year={2013},
  volume={12 10},
  pages={925-31}
}
It is generally accepted that supported graphene is hydrophobic and that its water contact angle is similar to that of graphite. Here, we show that the water contact angles of freshly prepared supported graphene and graphite surfaces increase when they are exposed to ambient air. By using infrared spectroscopy and X-ray photoelectron spectroscopy we demonstrate that airborne hydrocarbons adsorb on graphitic surfaces, and that a concurrent decrease in the water contact angle occurs when these… CONTINUE READING
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