Roman V. Gorbachev, Ibtsam Riaz, Rahul R. Nair, Rashid Jalil, Liam Britnell, Branson D. Belle, Ernie W. Hill, Kostya S. Novoselov, Kenji Watanabe, Takashi Taniguchi, Andre K. Geim and Peter Blake Hunting for Monolayer Boron Nitride: Optical and Raman Signatures Small 7
Version of Record online: 7 JAN 2011 | DOI: 10.1002/smll.201001628
The identification of single- and few-layer boron nitride is described. Its optical contrast is much smaller than that of graphene, but even monolayers are discernable by optimizing viewing conditions. The number of layers in thicker crystals can be counted by exploiting an integer-step increase in the Raman intensity and optical contrast.
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