Fig. 7From: Herbal medicine derived carbon dots: synthesis and applications in therapeutics, bioimaging and sensingCharacterization of chemical structure of hair-CDs (HCDs), skin-CDs (SCDs) and citric acid-CDs (CCDs). a XRD patterns, b Fourier transform infrared spectra, c XPS spectra, d C1s profile of HCDs, e C1s profile of SCDs, f C1s profile of CCDs, g N1s profile of HCDs, h N1s profile of SCDs, i N1s profile of CCDs. Reprinted with permission from ref. [42]. Copyright (2016) Springer NatureBack to article page