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EnglishWe show that the Raman spectrum of graphene is sensitive to the surface chemistry of the substrate where the atomic plane is deposited. Two types of functionalized SiO 2 surface are experimentally compared: OH-terminated and NH 2 -terminated. In the case of NH 2 -terminated surface, the graphene Raman bands are significantly redshifted with respect to the peaks observed on the hydroxylated surface. The observed phonon softening can be ascribed to a biaxial strain induced into graphene by its interaction with the substrate. Therefore, the control of the substrate surface chemistry may be envisaged as a route to graphene strain engineering.
Graphene strain tuning by control of the substrate surface chemistry / Bruna, Matteo; Vaira, A.; Battiato, A.; Vittone, E.; Borini, Stefano Marco. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - 97:(2010). [10.1063/1.3463460]
| Titolo: | Graphene strain tuning by control of the substrate surface chemistry | |
| Autori: | ||
| Data di pubblicazione: | 2010 | |
| Rivista: | ||
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1063/1.3463460 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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http://hdl.handle.net/11583/2461182
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