CdS/C60 binary nanocomposite films prepared via phase transition of PS-b-P2VP block copolymer

We demonstrate the well-defined control of phase transition of a polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) block copolymer from spherical micelles to lamellar structures, in which CdS and C-60 nanoparticles (NPs) are selectively positioned at the P2VP domains. The CdS NPs are in situ synthesized using PS-b-P2VP block copolymer templates that are self-assembled in PS-selective solvents. The CdS-PS-b-P2VP micellar structures are transformed to lamellar phase by adjusting a solvent selectivity for both blocks. In addition, a binary system of CdS/C-60 embedded in PS-b-P2VP lamellar structures (CdS/C-60-PS-b-P2VP) is fabricated by embedding C-60 molecules into P2VP domain though charge-transfer complexation between pyridine units of PS-b-P2VP and C-60 molecules. The CdS/C-60-PS-b-P2VP nanostructured films are characterized by transmission electron microscopy (TEM) and UV-Vis spectrometer. (C) 2013 Elsevier Inc. All rights reserved.