Q-CdS/聚合物纳米复合膜的制备与荧光性能

采用配位化学合成原理 ,分离制备出颗粒尺寸小于 10nm的单分散性的Q态CdS(Q CdS)纳米粒子 ,将Q CdS纳米粒子与聚合物复合成膜 ,制备出一系列Q CdS 聚合物纳米复合膜 .用紫外可见吸收光谱与透射电镜研究了纳米复合膜的量子尺寸效应和分散性 .通过荧光光谱探讨了不同聚合物基体材料和不同Q CdS含量的纳米复合膜的荧光发光性能 .结果表明 ,一方面这种以聚合物为基体的纳米复合膜 ,由于聚合物与Q CdS之间的相互作用 ,使纳米复合膜表现出与单一相组分完全不同的特征荧光发射峰 ;另一方面 ,随着纳米复合膜中Q CdS含量的不断增大 ,纳米复合膜的荧光强度不断增强 ,在一定浓度时达到最大值 .

PREPARATION AND FLUORESCENCE PROPERTIES OF Q-CdS/POLYMER NANOCOMPOSITE FILMS

Q-CdS nanoparticles (d<10 nm)were prepared by synthetic methods of coordination chemistry.Then a series of Q-CdS/polymer nanaocomposite films were successfully prepared by mixing Q-CdS with polymers.Their size quantization effect and dispersion were observed in UV-Vis spectra and TEM image.Fluorescent properties of nanocomposite films of different kind polymers or different Q-CdS contents,were studied by fluorescent spectra.Compared to CdS nanoparticles or pure polymers,nanocomposite films which were made of polymer and Q-CdS have special fluorescence spectra due to interaction between them.The fluorescence intensity of nanocomposite films increased with the Q-CdS nanoparticle content,showing a maximum at the ratio Q-CdS/Polymer=0.067/1 by wt.