Figure 15.

In vitro photodynamic activity of PHPP-SMNPs. SW480 cells were incubated with 0–80 μmol L−1PHPP-SMNPs for 24 h at 37 °C in the dark prior to irradiation for 10 min (4.35 J/cm2) with 488-nm argon-ion laser (4.35 J/cm2) from the underside of the culture plate. Cell viability was determined by MTT assay. Data represent mean ± SD (n = 3). Comparisons between two groups were made by unpaired two tailed Student’st-test using SPSS 15.0 software

Chen et al. Nanoscale Research Letters 2009 4:400-408   doi:10.1007/s11671-009-9254-5