Fig. 1From: Tryptophan-sorbitol based carbon quantum dots for theranostics against hepatocellular carcinomaA TEM image of TC-WS-CQDs. The insets are size distribution of TC-WS-CQDs (upper left) and HRTEM image (lower right). B PL EEM (upper) and UV–Vis absorption (lower) of the TC-WS-CQDs under different excitation wavelengths. B-, G-, and R-WS-CQDs refer to Blue-, Green-, and Red-WS-CQDs respectivelyBack to article page