Figure 3From: Unusual surface and edge morphologies, sp2 to sp3 hybridized transformation and electronic damage after Ar+ ion irradiation of few-layer graphene surfacesTwo-dimensional PSD spectra calculated from 1 × 1 μm AFM images (energies: 0.25 to 5 keV). Obtained after irradiation of the samples at different energies from 0.25 to 5 keV. The spectrum for the un-irradiated sample is also plotted for comparison.Back to article page