The influence of GQDs with different functional groups on the mortality of cells. (a) Cell mortality of A549 cells after treated with different concentrations of three GQDs. (b) Cell mortality after exposed to different concentrations of three kinds of GQDs evaluated in C6 cell line. Asterisk indicated p < 0.05 and double asterisk represented p < 0.01.
Yuan et al. Nanoscale Research Letters 2014 9:108 doi:10.1186/1556-276X-9-108