Figure 7.

(A) GQDs containing different (170, 132, and 168) conjugated carbon atoms; reproduced from Yan et al. (2010) with permission from the American Chemical Society. (B) The representation of three different colloidal GQDs prepared by solution chemistry; reproduced from Li et al. (2012b) with permission from the American Chemical Society. (C) STM images represented the different shapes of GQDs prepared by cage opening approach; reproduced from Lu et al. (2011) with permission from Nature Publishing Group. (D) Illustration of the process of graphene-oxide-like QDs (GOLQDs) formation by the oxidization of C₆₀; reproduced from Chen et al. (2015) with permission from Wiley.