Structural and optical properties of CdS nanocrystals grown in water-soluble diblock copolymer

BAYKUL M. C., Ruzgar H., Arman E., Bas Y., BÜTÜN V.

12th International Conference on Formation of Semiconductor Interfaces, Weimar, Germany, 01 February 2010, vol.7, pp.423-426 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 7
  • Doi Number: 10.1002/pssc.200982468
  • City: Weimar
  • Country: Germany
  • Page Numbers: pp.423-426
  • Eskisehir Osmangazi University Affiliated: Yes

Abstract

Methoxy-capped poly(ethylene glycol) (PEG) was used to prepare ATRP initiator (PEGBr). PEGBr was copolymerised with t-butyl methacrylate (tBMA) by using atom transfer radical polymerization (ATRP) chemistry. tBMA residues were converted to methacrylic acid (MAA) by acidic hydrolysis under mild conditions to give well-defined PEG-b-PMAA diblock copolymers. Near-monodisperse micellization was observed by the addition of CdCl2 (1.0 wt%) into PEG-b-PMAA diblock copolymer solution at pH 11.0 due to complexation of MAA(-) with Cd+2 ions. After addition of thioacetamide into the micellar solution, the Cd+2 cations in the resulting micelles were converted to CdS to obtain CdS nanocrystals in the micelles.