由CdSe和CdTe纳米晶体组成的发光三维有序多孔材料。
Luminescence 3D-ordered porous materials composed of CdSe and CdTe nanocrystals.
作者信息
Yang Linglu, Yang Zhaohui, Cao Weixiao, Chen Li, Xu Jun, Zhang Huizhen
机构信息
College of Chemistry and Molecular Engineering and School of Physics, Peking University, Beijing 100871, China.
出版信息
J Phys Chem B. 2005 Jun 16;109(23):11501-4. doi: 10.1021/jp050242r.
The luminescence porous materials of CdTe or CdSe nanocrystals (NCs) were prepared by filling the corresponding NCs into the voids of colloidal crystal by co-deposition of polymer beads and NCs. After removing the beads with tetrahydrofuran (THF), the 3D-ordered porous materials of CdTe (or CdSe) NCs were obtained. The wavelength of maximum photoluminescence of the NCs porous material shows obvious red shift compared with their aqueous dispersion. Under the excitation of high-energy electron the porous materials of CdTe and CdSe NCs will emit photons that can be collected to form a cathode luminescence (CL) image.
通过将聚合物微球与碲化镉（CdTe）或硒化镉（CdSe）纳米晶体（NCs）共沉积，将相应的纳米晶体填充到胶体晶体的空隙中，制备出了发光多孔材料。用四氢呋喃（THF）去除微球后，得到了CdTe（或CdSe）纳米晶体的三维有序多孔材料。与纳米晶体的水分散体相比，纳米晶体多孔材料的最大光致发光波长出现明显红移。在高能电子激发下，CdTe和CdSe纳米晶体的多孔材料会发射光子，这些光子可以被收集起来形成阴极发光（CL）图像。
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