Polymer grafting from Cds quantum dots via AGET ATRP in miniemulsion

resumo

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.

palavras-chave

TRANSFER RADICAL POLYMERIZATION; SEMICONDUCTOR NANOCRYSTALS; ELECTRON-TRANSFER; BLOCK-COPOLYMERS; NANOPARTICLES; BRUSHES; GROWTH; ENCAPSULATION; MONODISPERSE; LUMINESCENT

categoria

Chemistry; Science & Technology - Other Topics; Materials Science; Physics

autores

Esteves, ACC; Bombalski, L; Trindade, T; Matyjaszewski, K; Barros-Timmons, A

nossos autores

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