金属纳米颗粒-聚电解质多层膜的X射线反射率研究

用静电自组装技术制备了不同层数的Au纳米颗粒-聚电解质多层膜,用X射线反射及原子力显微镜对膜的微结构进行了表征.研究发现,当Au纳米颗粒下面的聚电解质层较薄时,膜中无清晰的界面结构;随着Au纳米颗粒下面的聚电解质层的增厚,金属-聚电解质多层膜的界面变得越来越清晰.

X-ray Reflectivity Studies on Metal Nanoparticle/Polyelectrolyte Multilayers

Electrostatic self-assembly technique was used to prepare Au-nanoparticle/polyelectrolyte multilayers. The microstructures of the films were characterized by X-ray reflectivity and the atomic force microscopy. It is found that when the polyelectrolyte layers under the Au nanoparticles were thin, there were no clear interfaces in the films; when the polyelectrolyte layers got thick, the interfaces become clear. Therefore, it needs to increase properly the thickness of the polyelectrolyte layers in order to get the metal nanoparticle/polyelectrolyte multilayers with clear interfaces.