Fig. 3From: Herbal medicine derived carbon dots: synthesis and applications in therapeutics, bioimaging and sensingCDs derived from watermelon peels. a The synthesis procedure. b HRTEM image and the higher magnification image (inset). c Confocal microscopy image of Hela cells incubated with watermelon peel-CDs. Reprinted with permission from ref. [33]. Copyright (2012) ElsevierBack to article page