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Comparison of the emission and absorption spectra of TOPO and peptide-coated CdSe/ZnS nanocrystals. Peptide-coated (green, yellow, and red) and TOPO-coated nanocrystals (dash, dash–dot, and short dash) have identical emission spectra after water solubilization with peptide 4. Insert: The absorption of TOPO-coated CdSe/ZnS nanocrystals (dash) is unchanged after peptide coating (green).
