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Polymer Grafting from CdS Quantum Dots via AGET ATRP in Miniemulsion

2007; Wiley; Volume: 3; Issue: 7 Linguagem: Inglês

10.1002/smll.200600510

1613-6829

A. Catarina C. Esteves, Lindsay Bombalski, Tito Trindade, Krzysztof Matyjaszewski, Ana Barros‐Timmons,

Chalcogenide Semiconductor Thin Films

Abstract We report the synthesis of CdS quantum dot (QD)–poly(acrylate) nanocomposites using a recently developed catalytic system where activators are generated by electron transfer for atom‐transfer radical polymerization (ATRP) in a miniemulsion. The QD surface was functionalized with a tris(alkyl)phosphine, previously modified with an ATRP chlorine initiator, and subsequent controlled polymerization was carried out from the functionalized surface of nanoparticles. The final material showed a high homogeneity and the QDs were evenly dispersed. The optical‐absorption edge in the visible spectra of the nanocomposites attests the presence of the CdS QDs. Quantum confinement effects were assigned, though a blue shift in relation to the optical spectrum of the initial QDs has been observed.