Hunting for Monolayer Boron Nitride: Optical and Raman Signatures

Details Hunting for Monolayer Boron Nitride: Optical and Raman Signatures Hunting for Monolayer Boron Nitride: Optical and Raman Signatures

2010-08-17

arxiv.org/abs/1008.2868v1

Small 7, 465-468 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1002/smll.201001628

We describe the identification of single- and few- layer boron nitride. Its optical contrast is much smaller than that of graphene but even monolayers are discernable by optimizing viewing conditions. Raman spectroscopy can be used to confirm BN monolayers. They exhibit an upshift in the fundamental Raman mode by up to 4 cm-1. 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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