Cleaning graphene: comparing heat treatments in air and in vacuum

@article{Tripathi2017CleaningGC,
  title={Cleaning graphene: comparing heat treatments in air and in vacuum},
  author={Mukesh Tripathi and A. Mittelberger and K. Mustonen and C. Mangler and J. Kotakoski and J. Meyer and T. Susi},
  journal={arXiv: Materials Science},
  year={2017}
}
Surface impurities and contamination often seriously degrade the properties of two-dimensional materials such as graphene. To remove contamination, thermal annealing is commonly used. We present a comparative analysis of annealing treatments in air and in vacuum, both ex situ and "pre-situ", where an ultra-high vacuum treatment chamber is directly connected to an aberration-corrected scanning transmission electron microscope. While ex situ treatments do remove contamination, it is challenging… Expand
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