We report free-standing atomic crystals that are strictly 2D and can be viewed as individual atomic planes pulled out of bulk crystals or as unrolled single-wall nanotubes. By using micromechanical cleavage, we have prepared and studied a variety of 2D crystals including single layers of boron nitride, graphite, several dichalcogenides, and complex oxides. These atomically thin sheets (essentially gigantic 2D molecules unprotected from the immediate environment) are stable under ambient conditions, exhibit high crystal quality, and are continuous on a macroscopic scale.
Andrey V. Kretinin, Yang Cao, J. S. Tu, Guoliang Yu, R. Jalil, Konstantin ‘kostya’ Novoselov, Sarah J. Haigh, A. Gholinia, Artem Mishchenko, M. Lozada, Thanasis Georgiou, Colin R. Woods, Freddie Withers, Peter Blake, Goki Eda, A. Wirsig, C. Hucho, Kenji Watanabe, Takashi Taniguchi, A. K. Geǐm, Р. В. Горбачев
Yang Cao, Artem Mishchenko, Geliang Yu, Ekaterina Khestanova, Aidan P. Rooney, Éric Prestat, Andrey V. Kretinin, Peter Blake, M. Ben Shalom, Colin R. Woods, Joan M. Chapman, G. Balakrishnan, I. V. Grigorieva, Konstantin ‘kostya’ Novoselov, B. A. Piot, M. Potemski, Kenji Watanabe, Takashi Taniguchi, Sarah J. Haigh, A. K. Geim, Р. В. Горбачев
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