Figure 2

AFM topographic images of GO and CXYG stock suspensions. Both stock suspensions comprised nanoplatelets of heterogeneous size and shape. For illustration purposes, the lateral dimension of some GO and CXYG nanoplatelets is displayed in the images (white arrows). Red arrows exemplarily indicate small nanoplatelets whose lateral dimension could not be measured. Height measurements performed on GO stock suspensions (A) indicated that GO nanoplatelets were single-layered (~0.8 nm). Height measurements performed on CXYG stock suspensions (B) indicated that CXYG nanoplatelets were both single- and few-layered (0.8 - 2.4 nm). Examples of height profiles are presented below the corresponding topographic images (section along the white line visible in the AFM image).