Self-Assembled TiO2/PSS Multilayer Films Studied by Slow Positron Spectroscopy
HAO Wei-Chang1, PAN Feng1, WANG Tian-Min1, ZHOU Chun-Lan2, WEI Long2
1Center of Materials Physics and Chemistry, Beijing University of Aeronautics and Astronautics, Beijing 100083
2Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039
Self-Assembled TiO2/PSS Multilayer Films Studied by Slow Positron Spectroscopy
1Center of Materials Physics and Chemistry, Beijing University of Aeronautics and Astronautics, Beijing 100083
2Laboratory of Nuclear Analytical Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039
Abstract： TiO2/PSS nano-structured multilayer films are fabricated by a layer-by-layer self-assembly method, and the deposition process and interface structure of films are studied in detail by slow positron spectroscopy. The results indicate that injection energy of positron at the interface between the substrate and the film shows a linear dependence on the number of bilayer, which suggests that the repeatability of the depositing process is good, and the thickness of films shows a linear increase with the number of bilayers adding. The calculated result of the film thickness shows that there is an overlay between the adjacent TiO2 nanoparticle layers.
2006, Vol. 23 
