Water-soluble CdSe/ZnS quantum dots passivated by
poly(glycino amino acid) phosphazenes
poly(glycino amino acid) phosphazenes
(Key Laboratory of Advanced Functional Materials, College of Material Science and Engineering,
Beijing University of Technology, Beijing 100124, China)
Beijing University of Technology, Beijing 100124, China)
Abstract: Poly(organophosphazenes) have potential applications in making water-soluble and biocompatible quantum dots (QDs) due to their wide variety of properties. The CdSe QDs of green emission and the core-shell CdSe/ZnS QDs of red emission were prepared. Subsequently the trioctylphosphine oxide-stabilized CdSe/ZnS QDs were transferred from chloroform into water through a ligand exchange process with poly(glycino amino acid)phosphazenes, which can be obtained from the saponification of poly (glycino amino ester)phosphazenes at room temperature. The resulting QDs-polymer nanocomposite particles can form colloidally stable suspensions in water and exhibit good photostability.
Key words: polyphosphazenes; CdSe/ZnS quantum dots; water-solublity; nanocomposite particles