Edge chirality determination of graphene by Raman spectroscopy

Details Edge chirality determination of graphene by Raman spectroscopy Edge chirality determination of graphene by Raman spectroscopy

2008-10-28

arxiv.org/abs/0810.4981v1

Applied Physics Letters 93, 163112 (2008)

Physics

Condensed Matter

Materials Science

14 pages, 3 figures, 1 table

Scientific paper

10.1063/1.3005599

Raman imaging on the edges of single layer micromechanical cleavage graphene (MCG) was carried out. The intensity of disorder-induced Raman feature (D band at ~1350 cm-1) was found to be correlated to the edge chirality: it is stronger at the armchair edge and weaker at the zigzag edge. This shows that Raman spectroscopy is a reliable and practical method to identify the chirality of graphene edge and to help in determination of the crystal orientation. The determination of graphene chirality is critically important for fundamental study as well as for applications.

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