巯萘剂表面修饰的CdS纳米微粒的合成及发光特性

用疏萘剂(TN)作为表面修饰剂,在甲醇溶液中合成了CdS/TN纳米微粒,用TEM测得纳米微粒呈球形,其粒径约10nm,吸收光谱和荧光光谱研究表明,S^2-]/TN]浓度比、TN和镉离子的浓度对CdS/TN纳米微粒的粒径及发光特性具有显著影响,且随着条件的改变,CdS/TN纳米微粒的发射波长红移100nm,表现出明显的量子尺寸特性.XPS显示所制得表面修饰纳米微粒的核为CdS.

Synthesis and Luminescence Properties of Thionalid-stabilized CdS Nanoparticles

The thionalid-stabilized CdS nanoparticles (named as CdS/thionalid) have been synthesized in methanol by colloidal solution method. The images of TEM demonstrate that the average size of CdS/ thionalid nanoparticles is about 10 nm. Spectra of absorption and fluorescence show that both the ratio of S2-]/TN] and concentrations of thionalid and cadmium ion have influence on the size and luminescence properties of the nanoparticles. On varying experimental conditions, the maximum emission wavelength of CdS/thionalid nanoparticles has the largest red shift of 100 nm, and quantum confinement effect can be obviously observed. Values of XPS confirm that the core of CdS/thionalid nanoparticles is CdS.