Raman spectrum of graphene and graphene layers.
Phys Rev Lett
; 97(18): 187401, 2006 Nov 03.
Article
em En
| MEDLINE
| ID: mdl-17155573
ABSTRACT
Graphene is the two-dimensional building block for carbon allotropes of every other dimensionality. We show that its electronic structure is captured in its Raman spectrum that clearly evolves with the number of layers. The D peak second order changes in shape, width, and position for an increasing number of layers, reflecting the change in the electron bands via a double resonant Raman process. The G peak slightly down-shifts. This allows unambiguous, high-throughput, nondestructive identification of graphene layers, which is critically lacking in this emerging research area.
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MEDLINE
Idioma:
En
Ano de publicação:
2006
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Article