制备导电聚合物-半导体纳米颗粒自组装膜

中国科学院基础局“九五”重大项目资助（ KJ950-A1-505-02）　　有机-无机纳米复合材料在高级功能器件制造中有巨大的应用前景 .这些器件中需要控制其中各个组分在纳米、甚至分子尺度上的取向 1]（ orientation）和组织 2]（ organization） ,因为它们的功能强烈地依赖于其局部化学微环境和相关结构的尺寸 .近年来 ,逐层自组装（ Layer-By-Layer Assembly）技术作为一种制备多层超薄复合膜的新方法已引起广泛关注 .采用具有相反电荷的聚电解质与表面修饰的纳米颗粒 ,通过逐层自组装过程 ,是制备分子有序排列的纳米多层复合结构膜材料…

Synthesis of Conductive Polymer/Semiconductor Nanocomposite Films by Layer-by-layer Assembly Techniques

Using layer-by-layer self-assembly technique,we have successfully constructed nanostructured composite films of conjugated polymer (sulfonic acid ring substituted polyaniline, SPAn)/ semiconductor nanoparticles(Q-CdS).The processes synthesis have been studied by UV-Vis, contact angle measurement, XPS and AFM techniques.The results indicated that the self-assembly processes were dependent on the pH of the solution of each component and the doping time.It has been found that the roughness of the assembled nano-composite films increases as the layer number increases.The main reason can be attributed to the generation of adsorption defects from partially adsorbed film surface in film fabrication processes.