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Ce-doped TiO2-multi walled carbon nanotubes (Ce-doped MCNTs/TiO2) composites were successfully synthesized by the hydrothermal method. The crystalline structure, surface morphology and optical properties of samples were characterized using X-ray diffraction (XRD), transmission electron microscope (TEM) and ultraviolet-visible diffuse reflection spectroscopy (UV-vis) analysis technologies. The Ce-doped...
We have synthesized a variety of novel gold and palladium nanostructures by using simple aqueous solution growth approaches. In this conference, I will describe our recent work on the seed-mediated synthesis of palladium nanorods and branched nanocrystals. Hydrothermal synthesis of monodispersed octahedral gold nanocrystals and their self-assembled structures will be presented. The optical, SERS,...
Bi25FeO40 powders have successfully been synthesized by simple hydrothermal method. The effect of the concentration of mineralizer and stoichiometry on the prepared samples was investigated. With the UV-Vis spectra, Bi25FeO40 powders have a broad absorption band in the range of 400-600 nm and a good visible-light-response ability. Photo-catalytic activity of Bi25FeO40 powders was evaluated by the...
This paper presents spectral characterization of Yb3+ in CLNGG crystals grown by Chochralski method in platinum crucibles with effective Yb concentration up to 4.3 at. %. The room temperature absorption consists of an intense 2F7/2(1) rarr 2F5/2(1) band centered around 972 nm and a group of unresolved lines corresponding to the other electronic transitions or to vibronics extending from about 910...
This paper reports the synthesis of highly lumimescence CdSe quantum dots via wet-chemical process and the study of the surfactant concentration effect on the improvement of the photoluminescence characteristic. Here, we also discussed in detail the quantum dots synthesis procedure and the mechanism for the improvement of the luminescence characteristic of CdSe quantum dots under a different surfactant...
Iron-doped Pb(Zn/sub 1/3/Nb/sub 2/3/)O/sub 3/-PbTiO/sub 3/ relaxor ferroelectric crystal was grown by the flux method. The photorefractive effect is investigated and a larger two-beam coupling gain coefficient is obtained. The photochromism is observed under the illumination of blue or green laser light.
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