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

doi:10.1021/ma0525740

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 journal › Article › peer-review

87 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 language	English (US)
Pages (from-to)	3664-3672
Number of pages	9
Journal	Macromolecules
Volume	39
Issue number	10
DOIs	https://doi.org/10.1021/ma0525740
State	Published - May 16 2006
Externally published	Yes

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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

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.",

author = "Mingfeng Wang and Oh, {Jung Kwon} and Dykstra, {Tieneke E.} and Xudong Lou and Scholes, {Gregory D.} and Winnik, {Mitchell A.}",

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T1 - Surface modification of CdSe and CdSe/ZnS semiconductor nanocrystals with poly(N,N-dimethylaminoethyl methacrylate)

AU - Wang, Mingfeng

AU - Oh, Jung Kwon

AU - Dykstra, Tieneke E.

AU - Lou, Xudong

AU - Scholes, Gregory D.

AU - Winnik, Mitchell A.

PY - 2006/5/16

Y1 - 2006/5/16

N2 - 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.

AB - 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.

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JF - Macromolecules

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

Abstract

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