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Title: Synthesis, characterization, and nonlinear optical properties of hybridized CdS-polystyrene nanocomposites
Authors: Du, H.
Xu, G.Q. 
Chin, W.S. 
Huang, L.
Ji, W. 
Issue Date: 1-Oct-2002
Citation: Du, H., Xu, G.Q., Chin, W.S., Huang, L., Ji, W. (2002-10-01). Synthesis, characterization, and nonlinear optical properties of hybridized CdS-polystyrene nanocomposites. Chemistry of Materials 14 (10) : 4473-4479. ScholarBank@NUS Repository.
Abstract: Hybrid composites of CdS nanoparticles embedded in sulfonated polystyrene (PS) matrixes have been prepared and characterized. The -SO3 - groups acted as the coordination sites for cadmium ion aggregations and nanosized CdS particles were successfully grown in situ at these sites with the release of S2- ions from thioacetamide. The density and size of the nanoparticles were found to be a function of the sulfonate content of PS and the concentration of Cd2+ feed ions used. Ionic clusterings within the polymer matrix occurred at a sulfonate content of 9.9 mol % and has provided a confined medium for particle growth in uniform size. The optical properties of the prepared CdS-PS hybrid composites were characterized by linear absorption and fluorescence spectra. Z-scan measurement was also employed to investigate the nonlinear optical properties at a wavelength of 532 nm. The results showed that the nonlinear refractive index of the composite varies with the input irradiance, thus indicating not just third-order but possible higher order nonlinearity.
Source Title: Chemistry of Materials
ISSN: 08974756
DOI: 10.1021/cm010622z
Appears in Collections:Staff Publications

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