Supplementary Figure 6: Fluorescence image of living HeLa cells incubated with TTA-UCNPs.
From: Upconversion luminescence imaging of cells and small animals
(a) Conventional fluorescence image of living HeLa cells incubated with TTA-UCNPs, excited at 405 nm; emission was collected at 420-480 nm. (b) Overlay of bright-field image, luminescence images (a) and a TTA-UCL image.
