A CdSe/ZnSe/ZnS Core/Shell/Shell, quantum dot (core diameter 3.9 ± 0.5 nm, λEM = 550 ± 8 nm, fluorescence quantum yield = 62%) bearing the mixed HDA/TOP/TOPO surface ligands in hexane were purchased from Center for Applied Nanotechnology (CAN) GmbH. H2O used was ultrapure (resistance >18.2 MΩ.cm), purified by an ELGA Purelab classic UVF system. All other chemicals and reagents were purchased commercially and used as received unless stated otherwise.