Fig. 4

Optical performance of the (DOC + E6E7) @DOTAP nanoparticles. A Fluorescence excitation spectra. B Fluorescence emission spectra. C Fluorescence properties of different samples after AIE was embedded in the hydrophobic shell of DOTAP were monitored by an in vivo imaging system (IVIS). D Confocal laser scanning microscope images of Hela cells incubated with nanoparticles for 6 h. Blue and red fluorescence represent Hoechst-stained nuclei and AIE fluorescence, respectively. Scale bars, 20 μm