Fig. 2 | npj 2D Materials and Applications

Fig. 2

From: Formation of environmentally stable hole-doped graphene films with instantaneous and high-density carrier doping via a boron-based oxidant

Fig. 2

a Schematic of the doping procedure, which involves rinsing of the doped graphene film by dry ODCB. b AFM images of pristine and doped graphene films. The root mean square (RMS) values of each film are also displayed. c Current–voltage characteristics of pristine (gray) and doped (red) graphene samples on a glass substrate (Sample #1). d Optical transmittance spectra of pristine (gray) and doped (red) graphene samples on a glass substrate (Sample #1). e A summary of the relation between the transmittance decrease (ΔT) at 550 nm and the sheet resistance ratio R/R0. The red circle corresponds to the results of this work. The results from previous reports are also plotted. f Time-dependent changes in ambient air of the sheet resistance ratio R/R0. The results from previous reports using other dopants (AuCl3, HNO3, RhCl3, and TFSA) are also plotted

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