Preparation of Organic/inorganic Combined Cylindrical Nanoparticles by Surface-Modification of Surfactant Tubules.

(1)表面活性剂管的替代型化学镀金沿作为小管前驱体的小管的接缝或双层带的边缘形成螺旋Au纳米线。(2)通过改变小管的制备条件可以比较各种类型的小管。在其上制备的Au纳米线可以是纤维状、纱线型、螺旋状、双螺旋状、多螺旋状，具体取决于管子的类型。(3)通过有机溶剂提取表面活性剂或对管子进行热处理，将金属纳米线从有机/无机复合聚集体中分离出来。从而得到纤维状、纱线型、螺旋状、双螺旋状、多螺旋状的Au纳米线。(4)推测Au在小管上的吸附位置可能是表面活性物质结构中的富电子三键。用不含多键的表面活性剂制备的微管不电镀。由导电聚合物聚苯胺制得的镀金管被成功地镀金。(5)对镀金的聚苯胺管进行热处理，部分形成了许多细小的金纳米线。其机制目前尚不清楚。这可能成为一种制备金纳米细线的新方法。这项研究也可能为聚苯胺管的结构提供线索。

(1) A substitution-type electroless Au plating of surfactant tubules formed spiral Au nanowires along the seams of the tubules or the edges of the bilayer ribbons which are precursors of the tubules.(2) Variouis type of tubules can be parepared by varying the condition for the preparation of the tubules. The Au nanowires prepared on them were fibrous, yarn-type, spiral, double helical, multi-helical depending on the type of the tubules.(3) The metallic nanowires were separated from the organic/inorganic combined aggregates thus prepared by extraction of the surfactant with organic solvent or the heat treatment of the tubules. Therefore, fibrous, yarn-type, spiral, double helical, multi-helical Au nanowires were obtained.(4) The location of the Au adsorption on the tubule was presumed to be the electron-rich triple bond of the surfactant structure. The tubules prepared from a surfactant without multiple-bond resulted no plating. A tubule prepared from polyaniline, an electrically conducting polymer,was successfully plated with Au.(5) A heat treatment of the Au-plated tubules of polyaniline partly formed many thin Au nanowires. The mechanism is currently unknown. It may become a new method for the preparation of thin gold nanowires. The study may also provide a hint for the structure of polyaniline tubules.