半导体纳米复合材料ZnS/PMMA制备及其光学性质的研究

采用预聚法和溶胀法制备了具备光学透明性和可加工性的半导体纳米复合材料ZnS/PMMA. 用透射电镜(TEM)观察了ZnS纳米粒子在聚合物基体中的形貌. 结果表明， 基体中ZnS为六方晶型. 比较了分别以含锌微凝胶(ZnP)和ZnCl2为Zn2+源时,ZnS在基体中的生长情况. 紫外吸收和荧光光谱表明,掺杂了ZnS后的PMMA基体在280 nm处出现了一个新的吸收峰和强的荧光峰.

Synthesis and Optical Properties of Semiconductor Nanocomposite Material ZnS/PMMA

Nanocomposite materials have many peculiar optical characteristics and quantum effect of the different nanoparticals in the matrix, such as optical amplification, photo absorbance fluorescence and nonlinear optical phenomena. And all of these materials have already exhibited immense application foreground, especially in the fields of optical apparatus and optical waveguide. Here the cubic nanocomposite materials ZnS/PMMA with good optical properties and machinability were synthesized by two methods of propolymerizing and swelling. TEM image was used to study ZnS nanoparticles in the PMMA matrix. Electron diffraction results show that the ZnS nanoparticles have a hexagonal structure. The ZnS nanoparticles growing process in the PMMA matrix at respective Zn 2 source of microgel(ZnP) and ZnCl_ 2 was observed. The effect at different time on the preparation of these samples was measured by using UV-Vis absorption and Fluorescence. The spectra show that PMMA have a new absorption peak at about 280 nm and strong fluorescence phenomenon when it mixed with ZnS.