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Characterization of hydrogen plasma defined graphene edges

Rehmann, Mirko K. ; Kalyoncu, Yemliha B. ; Kisiel, Marcin ; Pascher, Nikola ; Giessibl, Franz J. ; Müller, Fabian ; Watanabe, Kenji ; Taniguchi, Takashi ; Meyer, Ernst ; Liu, Ming-Hao ; Zumbühl, Dominik M.


We investigate the quality of hydrogen plasma defined graphene edges by Raman spectroscopy, atomic resolution AFM and low temperature electronic transport measurements. The exposure of graphite samples to a remote hydrogen plasma leads to the formation of hexagonal shaped etch pits, reflecting the anisotropy of the etch. Atomic resolution AFM reveals that the sides of these hexagons are oriented ...


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