Fig. 1. The three ZnO nanocrystals used in this study: (a) pristine ZnO NCs, (b) amine-propyl functionalized ZnO–NH2 NCs, and (c) lipid-coated ZnO–DOPC NCs. From left to right: scheme of the particles, FESEM, TEM and STEM images for each NC type. For FESEM images all the NCs were coated by a thin layer of Pt. The scale bar is 50 nm in all FESEM and TEM images, whereas it is 20 nm in all the three STEM images (right column).
