Figure 2.

Cell viability of SMMC-7721 cancer cells treated with different concentrations of different-sized ZnO NPs in the presence and absence of UV irradiation. a Target cancer cells treated with ZP5 NPs and b the comparison of cell viability in different ZP5 NPs concentration with/without UV irradiation; c Target cancer cells treated with ZP5 NPs and d the comparison of cell viability in different ZP6 NPs concentration with/without UV irradiation; e Target cancer cells treated with ZP5 NPs and f the comparison of cell viability in different ZP7 NPs concentration with/without UV irradiation

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