摘要
Aromatic molecules can effectively exfoliate graphite into graphene monolayers, and the resulting graphene monolayers sandwiched by the aromatic molecules exhibit a pronounced Raman G-band splitting, similar to that observed in single-walled carbon nanotubes. Raman measurements and calculations based on the force-constant model demonstrate that the absorbed aromatic molecules are responsible for the G-band splitting by removing the energy degeneracy of in-plane longitudinal and transverse optical phonons at the Γ point.
源语言 | 英语 |
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文章编号 | 135501 |
期刊 | Physical Review Letters |
卷 | 102 |
期 | 13 |
DOI | |
出版状态 | 已出版 - 30 3月 2009 |
已对外发布 | 是 |