Figure 1.

a Cell viability of SMMC-7721 cells at various concentrations of different-sized ZnO nanoparticles.Error bars indicate standard deviation. b The comparison of IC 50 values for different-sized ZnO NPs

Li et al. Nanoscale Research Letters 2010 5:1063-1071   doi:10.1007/s11671-010-9603-4