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X-ray radiation effects in multilayer epitaxial graphene
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) Non-contact AFM image of a Hall bar (dashed line outline; 10 μm wide) before (a) and after (b) irradiation. The arrows point to areas where the top layers of graphene peeled from the surface along a narrow path. (c) Height profile of the solid bar in Figs. 1(a) and 1(b), which goes over one such peeled path in the latter case. (d) Ratio of mobility (μ), carrier density (n), and resistivity (ρ) values of all Hall bars tested before and after irradiation with the vertical line representing the median value.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Background-subtracted Raman spectroscopy of bulk epitaxial graphene before (top) and after (bottom) irradiation. The G and 2D peaks are normalized independently to be the same integrated intensity. (b) C1s XPS of the same general area before (top) and after (bottom) irradiation, the former being fitted to two Lorentzians and the latter being fitted to six. The curves are normalized to have the same integrated graphene intensity and shifted to have the same graphene peak position (284.5 eV).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: X-ray radiation effects in multilayer epitaxial graphene