聚苯胺纳米线阵列的电化学组装研究

摘要

利用二次氧化法制备了多孔阳极氧化铝模板,通过控制电位聚合技术在阳极氧化铝模板内组装了聚苯胺纳米线阵列.采用扫描电子显微镜、透射电子显微镜和能谱仪等检测技术对填孔过程和阵列的形貌、结构进行分析和表征.结果表明,苯胺在纳米孔中的聚合过程经历四个阶段,填孔终止时间控制为第二阶段结束时间.阳极氧化铝模板中苯胺聚合适宜的电位为1.0V,pH为2.5.聚苯胺纳米线的直径均匀,约为70 nm,与模板孔径基本一致,为非晶结构.%Porous anodic aluminum oxide template was prepared by secondary oxidation and a polyaniline nanowire array was fabricated on the AAO template by potentiostatic polymerization.The morphology,phase structure of PANI nanowire array and the filling process were characterized by SEM,TEM and EDS.The results showed that the polymerization process undergone four stages and the filling termination time was controlled in the end of the second stage.The optimum polymerization potential was 1.0 V and the proper pH value was 2.5.The obtained nanowires had uniform diameters of about 70 nm which accorded with diameter of the nano-holes.