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. 2015 Apr 20;5:9693. doi: 10.1038/srep09693

Figure 1. UPS and XPS spectrum of pristine or n-type doped monolayer graphene on SiO2.

Figure 1

(a) The cut off and (b) valance band spectra of pristine, Cs2CO3-doped, and CsF-doped monolayer graphene. (c) The XPS spectra of C 1s peak of pristine, Cs2CO3-doped, and CsF-doped monolayer graphene.