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QD-based size series of particles and corresponding TEM images; a) water soluble PIL-coated QDs (10–20 nm), b) single QDs with PEGylated silica shell synthesized via reverse micelles (20–70 nm), and c) silica spheres with electrostatically assembled PIL-coated QDs followed by PEGylation for enhanced stability (100–150 nm). Scale bars are 20nm (a) and 100 nm (b, c) in length.
