Surface modification of CdSe and CdSe/ZnS semiconductor nanocrystals with poly(N,N-dimethylaminoethyl methacrylate)

Mingfeng Wang, Jung Kwon Oh, Tieneke E. Dykstra, Xudong Lou, Gregory D. Scholes, Mitchell A. Winnik

Research output: Contribution to journalArticle

82 Scopus citations

Abstract

We report passivation of CdSe and CdSe/ZnS nanocrystals (NCs) with poly(N,N-dimethylaminoethyl methacrylate) (PDMA) through a ligand exchange process. We present the results from various techniques that were used to verify that ligand exchange occurred, including 1H NMR, 31P NMR, and changes in solubility/ colloidal properties, hydrodynamic radius, and photoluminescence. We have examined the effect of polymer molecular weight on the surface passivation and quantum yields of the NCs. As additional evidence for the binding of the polymer to the surface of the NC, we were able to modify the polymer chemically to render the NC-polymer moiety water-soluble.

Original languageEnglish (US)
Pages (from-to)3664-3672
Number of pages9
JournalMacromolecules
Volume39
Issue number10
DOIs
StatePublished - May 16 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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