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Raman Fingerprint of Charged Impurities in Graphene
C. Casiraghi, S. Pisana, K. S. Novoselov +2
We report strong variations in the Raman spectra for different single-layer graphene samples obtained by micromechanical cleavage, which reveals the presence of excess charges, eve…
Electrochemically Top Gated Graphene: Monitoring Dopants by Raman Scattering
A. Das, S. Pisana, S. Piscanec +8
We demonstrate electrochemical top gating of graphene by using a solid polymer electrolyte. This allows to reach much higher electron and hole doping than standard back gating. In-…
Rayleigh Imaging of Graphene and Graphene Layers
C. Casiraghi, A. Hartschuh, E. Lidorikis +5
We investigate graphene and graphene layers on different substrates by monochromatic and white-light confocal Rayleigh scattering microscopy. The image contrast depends sensitively…
Two Dimensional Atomic Crystals
K. S. Novoselov, D. Jiang, T. Booth +3
We report free-standing atomic crystals that are strictly 2D and can be viewed as individual atomic planes pulled out of bulk crystals or as unrolled single-wall nanotubes. By usin…
Electric Field Effect in Atomically Thin Carbon Films
K. S. Novoselov, A. K. Geim, S. V. Morozov +5
We report a naturally-occurring two-dimensional material (graphene that can be viewed as a gigantic flat fullerene molecule, describe its electronic properties and demonstrate all-…