Figure 4.

Representative fluorescence microscope images of cells. (a) Fluorescence image describing control cells. (b) Cells treated with 50 μg/mL of aGQDs for 12 h. (c) Cells exposed to 50 μg/mL of cGQDs for 12 h. (d) Cells after the treatment of 50 μg/mL of dGQDs for 12 h. Magnification, ×20.

Yuan et al. Nanoscale Research Letters 2014 9:108   doi:10.1186/1556-276X-9-108
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