We synthesized PANI thin films by chemical oxidative polymerization technique using aniline monomer, oxidizing agent, and dopant acid. The effect of different oxidizing agents such as ammonium dichromate (ADC), chloroauric acid (CAA), and potassium permanganate (PPM) on the properties of PANI was investigated. The as-prepared PANI colloids were thoroughly characterized using a range of characterization techniques. Raman spectra demonstrate that all the intense bands associated to the emeraldine salt form of PANI. Optical absorption spectra revealed that the absorption peaks corresponds to π–π*, polaron and bipolaron transitions of emeraldine salt form of PANI. PL spectra demonstrate that the relative intensity of the peak arises due to the polaron band de-excitation increases for the PANI film synthesized using PPM due to the highest redox oxidation potential. A clear change in the surface morphology was observed for the samples grown with different oxidizing agents. A long fiber-like structure detected with CAA is proposed to be responsible for the development of the highly conducing emeraldine salt of PANI. The PANI sample prepared with CAA not only measured good electrical conductivity but the optical and morphological properties also showed promising characteristics for various device applications.

我们使用苯胺单体、氧化剂和掺杂酸通过化学氧化聚合技术合成了 PANI 薄膜。研究了重铬酸铵 (ADC)、氯金酸 (CAA) 和高锰酸钾 (PPM) 等不同氧化剂对 PANI 性能的影响。使用一系列表征技术对制备的 PANI 胶体进行了彻底表征。拉曼光谱表明所有与 PANI 的祖母绿盐形式相关的强谱带。光吸收光谱显示吸收峰对应于π – π*，PANI 的翡翠盐形式的极化子和双极化子跃迁。PL 光谱表明，由于最高氧化还原电位，使用 PPM 合成的 PANI 膜的极化子带去激发增加导致峰值的相对强度增加。对于用不同氧化剂生长的样品，观察到表面形态的明显变化。提出用 CAA 检测到的长纤维状结构负责开发 PANI 的高导电性祖母绿盐。用 CAA 制备的 PANI 样品不仅测量出良好的导电性，而且光学和形态特性也显示出适用于各种设备应用的有希望的特性。