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Intrinsic energy dissipation in CVD-grown graphene nanoresonators.
- Source :
-
Nanoscale [Nanoscale] 2012 Jun 07; Vol. 4 (11), pp. 3460-5. Date of Electronic Publication: 2012 Apr 27. - Publication Year :
- 2012
-
Abstract
- We utilize classical molecular dynamics to study the quality (Q)-factors of monolayer CVD-grown graphene nanoresonators. In particular, we focus on the effects of intrinsic grain boundaries of different orientations, which result from the CVD growth process, on the Q-factors. For a range of misorientation angles that are consistent with those seen experimentally in CVD-grown graphene, i.e. 0° to ∼20°, we find that the Q-factors for graphene with intrinsic grain boundaries are 1-2 orders of magnitude smaller than that of pristine monolayer graphene. We find that the Q-factor degradation is strongly influenced by both the symmetry and structure of the 5-7 defect pairs that occur at the grain boundary. Because of this, we also demonstrate that the Q-factors of CVD-grown graphene can be significantly elevated, and approach that of pristine graphene, through application of modest (1%) tensile strain.
Details
- Language :
- English
- ISSN :
- 2040-3372
- Volume :
- 4
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- Nanoscale
- Publication Type :
- Academic Journal
- Accession number :
- 22538383
- Full Text :
- https://doi.org/10.1039/c2nr30493g