Figure 3From: Advances and Prospect of Nanotechnology in Stem CellsVarious designs of multimodal QD probes. a b Quantum dots having different molecules for target-specific interaction, and, attached to the surface, paramagnetic lipids, and chelators for nuclear-spin labeling. c The silica sphere has QDs and paramagnetic nanoparticles inside and target-specific groups attached to the outside. d The structure of a multimodal QD probe, based on silica-shelled single-QD micelles [40]Back to article page