Figure 3

Microscopic view of (a) phase contrast image of ZnO nanowires capillary conjugated to PpIX and inserted into a fibroblast. (b) Reflex image of ZnO nanowires with capillary conjugated to PpIX just after insertion. (c) ZnO nanowire capillary tip near a single stained fibroblast. (d) Foreskin fibroblasts stained with Mito Tracker Red to visualize mitochondrial membrane potential.