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Synthesis and characterization of CdS quantum dots in polystyrene microbeads

Li, Yang and Liu, Eric Chun Yeung and Pickett, Nigel and Skabara, Peter J. and Cummins, Siobhan S. and Ryley, Stephen and Sutherland, Andrew J. and O'Brien, Paul (2005) Synthesis and characterization of CdS quantum dots in polystyrene microbeads. Journal of Materials Chemistry, 15 (12). pp. 1238-1243. ISSN 0959-9428

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Abstract

Polystyrene microbeads doped with highly luminescent CdS quantum dots (QDs) have been prepared. Polystyrene particles with diameters ranging from 100 nm to 500 mm were prepared by a suspension polymerization method and with different loadings of QDs. The resulting organic-inorganic microspheres have been characterized by FTIR, elemental analysis and SEM. Confocal microscopy and photoluminescence studies proved that the CdS nanoparticles were evenly distributed throughout the polystyrene spheres. The QDcontaining composites have similar optical properties to isolated CdS QDs. The thermal decomposition of the hybrid materials occurred at higher temperature than for the parent organic materials.