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|Title: ||Effects of disorder on the optical properties of CVD grown polycrystalline graphene|
|Authors: ||Podila, Ramakrishna|
Spear, John T.
Siva Sankara Sai, S.
Rao, Apparao M.
|Issue Date: ||Mar-2012 |
|Publisher: ||RSC Publishing|
|Citation: ||Nanoscal, 2012, Vol. 4, p1770|
|Abstract: ||We explore the effects of crystallite size (La) on the linear and non-linear optical properties of chemical vapor deposition grown polycrystalline graphene. The π-plasmon resonance present at [similar]4.75 eV ([similar]260 nm) in the optical absorption spectrum of graphene follows the empirical relationship λπ = 250.5 nm + 89.5 nm2/La, where λπ represents the π-plasmon wavelength. Furthermore, our Z-scan studies reveal that the crystallite size significantly changes the saturation intensity in CVD grown graphene. Notably, in comparison to epitaxial graphene layers grown on SiC wafers which exhibit a photogenerated carrier lifetime of few picoseconds, we find that the photogenerated carriers in our CVD grown graphene can exhibit lifetimes as long as nanoseconds.|
|Description: ||Restricted Access|
|Alternative Location: ||http://dx.doi.org/10.1039/C2NR11206J|
|Copyright: ||2012 RSC Publishing|
|Appears in Collections:||Research Papers (LAMP)|
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