聚吡咯纳米线的合成及形貌表征

采用阳离子表面活性剂十六烷基三甲基溴化铵（CTAB）为软模板，2-丙烯酰胺基-2-甲基丙磺酸（AMPSA）为掺杂剂，在15℃左右，以过硫酸铵为氧化剂，引发吡咯（Py）氧化聚合制备了形貌规整的聚吡咯（PPy）纳米线，其直径约为20～40nm。系统地研究了反应体系中CTAB、AMPSA和吡咯等试剂的浓度对PPy形貌的影响，并初步探讨了PPy纳米线的形成机理。结果表明，试剂浓度的变化对所得PPy形貌影响较小。此研究为制备规整的PPy纳米线开拓了一种快速稳定的方法。

Synthesis and morphological characterization of polypyrrole nanowires

Polypyrrole (PPy) nanowires with a uniform diameter of 20～40nm have been synthesized by rapid chemical oxidative polymerization of pyrrole (Py) at about 15℃, using ammonium persulfate ((NH₄)₂S₂O₈, APS) as oxidant, 2-acrylamido-2-methylpropanesulfonic acid (AMPSA) as dopant, and cetyltrimethylammonium bromide (CTAB) as the “soft template”. The effects of varying the concentrations of CTAB, AMPSA and Py on the morphology of the PPy are described in detail. It was found that this system has a high degree of flexibility in that PPy nanowires could be prepared when the concentration ratio of reagents was varied over a wide range. A plausible mechanism of formation of the PPy nanowires is proposed. The method provides a rapid and reliable route for the synthesis of well-defined PPy nanowires.