Fig. 2: Examination of flake lateral size and thickness.

a SEM images of graphite. b 2000 cycles. c 4000 cycles. d 6000 cycles. e The lateral size distribution is plotted as a function of processing cycles, error is calculated as the standard deviation (n = 50). f An AFM micrograph displaying a typical profile of a 6000 cycles graphene flake with a thickness of 8 nm and lateral size of 270 nm. The scale bar is 230 nm. g Lateral size and h thickness of the 6000 cycles graphene ink obtained from AFM analyses.