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Linear and Nonlinear Optical Properties of CdS and CdSe Nanoparticles Stabilized with Poly(N-vinyl-2-pyrrolidone)

Hiroshi YaoCentral Research Institute, Mitsui Toatsu Chemicals, Inc.,Shigeru TakaharaCentral Research Institute, Mitsui Toatsu Chemicals, Inc.,Hirokazu MizumaCentral Research Institute, Mitsui Toatsu Chemicals, Inc.,Takashi Kozeki Takashi KozekiCentral Research Institute, Mitsui Toatsu Chemicals, Inc.,Toyoharu HayashiCentral Research Institute, Mitsui Toatsu Chemicals, Inc.,

1996en

ABI

Annotatsiya

CdS and CdSe nanoparticles were prepared in organic solvents in the presence of poly(N-vinyl-2-pyrrolidone) (PVP). PVP plays an essential role in preventing the flocculation of concentrated nanoparticles (stabilizing effect), and in controlling the particle size under the influence of the solvent used. FT-IR measurements were performed to study the effect of the functional groups of PVP on particle size control at molecular levels. The PVP-coated CdS and CdSe nanoparticles obtained were dispersed in acrylonitrile-styrene (AS) copolymer or poly(2-hydroxyethyl methacrylate) (PHEMA) organic films, and third-order nonlinear optical susceptibilities |χ (3) | of these films were measured using a degenerate four-wave mixing (DFWM) technique. The largest |χ (3) | value of 1.1×10 -7 esu was obtained by excitonic resonant excitation for about 4.0 vol% CdS-doped PHEMA film.

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Identifikatorlar

DOI: 10.1143/jjap.35.4633

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