Recombination process of CdS quantum dot covered by novel polymer chains

An organic–inorganic compound was prepared by adding organic material to inorganic, semiconductor nanoparticles. Polyethylene glycol, tethered chains (PEG-TC) were added to the surface of CdS nanoparticles by a colloidal technique. The photoluminescence (PL) peak energy of the CdS nanoparticles gradually increased with the solvent density. Furthermore, by combining texas red streptavidin molecules with the PEG-TC on the surface of the CdS nanoparticles, the emission from texas red and change in the PL peak energy of CdS nanoparticle was observed. These results indicate that the recombination processes of the CdS nanoparticles can be controlled by the physical state of the PEG-TC chain.