Figure 3.

Dialysis of carbon quantum dots hydrothermally synthesized using graphite powders to obtain quantum dots with a uniform size distribution: (A) TEM micrographs and size distribution of carbon quantum dots that passed through a dialysis bag, showing smaller particles with a uniform size distribution. (B) TEM micrographs and size distribution of carbon quantum dots that did not pass through a dialysis bag, showing larger particles with a wide size distribution. Reproduced with permission from Ref. [52], copyright Elsevier, 2014.