Xia Haibing, Narayanan Janaky, Cheng Daming, Xiao Changyong, Liu Xiangyang, Chan Hardy Sze On
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, and Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542.
J Phys Chem B. 2005 Jul 7;109(26):12677-84. doi: 10.1021/jp0503260.
We report the preparation of ordered polyaniline (PANI) nanorod arrays in an aqueous medium. The oriented PANI nanorods (80-400 nm in diameter and 8-15 mum in length) were synthesized in the presence of hydrophilic Allura Red AC (ARAC) as the structure-directing agent and ammonium persulfate as an oxidant in HCl solution. The morphologies of the oriented PANI nanoparticle nanorods were confirmed by scanning electron microscopy (SEM) and transmission electron microscopy images, and the effect of reaction conditions on the morphology of PANI nanostructures was also studied. On the basis of the result obtained from small-angle X-ray scattering, we propose that rodlike micelle arrays of ARAC-aniline are responsible for directing the formation of oriented PANI nanoparticle nanorods. SEM images and the data analysis of static and dynamic light scattering give supportive evidence to the formation of the PANI nanoparticle nanorods by an elongation process. The chemical and electronic structures of the PANI nanorods were also studied by Fourier transform IR and UV-vis spectrometries, respectively.
我们报道了在水性介质中制备有序聚苯胺（PANI）纳米棒阵列的方法。在亲水性诱惑红AC（ARAC）作为结构导向剂和过硫酸铵作为氧化剂存在的情况下，于HCl溶液中合成了取向的聚苯胺纳米棒（直径80 - 400 nm，长度8 - 15μm）。通过扫描电子显微镜（SEM）和透射电子显微镜图像确认了取向聚苯胺纳米颗粒纳米棒的形态，并研究了反应条件对聚苯胺纳米结构形态的影响。基于小角X射线散射获得的结果，我们提出ARAC - 苯胺的棒状胶束阵列负责引导取向聚苯胺纳米颗粒纳米棒的形成。SEM图像以及静态和动态光散射的数据分析为聚苯胺纳米颗粒纳米棒通过伸长过程形成提供了支持证据。还分别通过傅里叶变换红外光谱和紫外 - 可见光谱研究了聚苯胺纳米棒的化学和电子结构。
