Templating of Inorganic Nanoparticles by PAMAM/PEG Dendrimer-Star Polymers

Published

September 1, 2002

Author(s)

R C. Hedden, Barry J. Bauer, A P. Smith, Franziska Grohn, Eric J. Amis

Abstract

Star polymers with a narrow distribution of sizes were labeled with fluorescent CdS nanoparticles, creating a new class of fluorescent probe molecules. Highly branched star polymers were prepared by attachment of poly(ethylene glycol) (PEG) arms to poly(amidoamine) (PAMAM) Generation 4 or Generation 7 dendrimer cores, yielding G4/PEG 64-arm and G7/PEG 280-arm stars. Fluorescent cadmium sulfide nanoparticles (quantum dots) were then introduced by addition of Cd2+ and S2- to solutions of the stars. The star polymers stabilized brightly fluorescent CdS particles of approximately 2-3 nm diameter. The structure and physical properties of the resulting nanocomposites were studied by aqueous gel permeation chromatography, small angle neutron scattering, ultraviolet-visible absorption spectroscopy, and fluorescence spectroscopy. These fluorescent stars may be useful to study mass transport in membranes or other structures with pores on the order of 10-100 nm.

Citation

Polymer

Volume

43

Issue

No. 20

Pub Type

Journals

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Keywords

dendrimer, nanocluster, quantum dot, star polymer

Citation

Hedden, R. , Bauer, B. , Smith, A. , Grohn, F. and Amis, E. (2002), Templating of Inorganic Nanoparticles by PAMAM/PEG Dendrimer-Star Polymers, Polymer, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=851944 (Accessed December 6, 2024)