Figure 8From: Long-term exposure of CdTe quantum dots on PC12 cellular activity and the determination of optimum non-toxic concentrations for biological useConfocal Image. Fluorescent confocal image of PC12 cells exposed to a 10-9 M concentration of QDs (A) and corresponding differential interference contrast (DIC) image (B) with A overlaid following 72 hours of co-incubation [scale bar = 20 μm].Back to article page