Bulk–surface nanostructure and defects in polyaniline films and fibres

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• 作者：El Khalki ; Abdelmalik ; Gruger ; Alain ; Colomban ; Philippe
• 关键词：Fibres ; Surface ; Polyaniline ; Nanostructure ; Microstructure
• 刊名：Synthetic Metals
• 出版年：2003
• 期刊代码：77_03796779
• 类别：ph
• 出版时间：September 5, 2003
• 卷：139
• 期：2
• 页码：215-220
• 文件大小：381 K

摘要

Polyaniline films and fibres were prepared by different ways using meta-cresol and camphor sulfuric acid. Their microstructures were studied by scanning electron microscopy and compared to those of films prepared using the NMP route and a usual emeraldine chloride salt powder. Raman scattering under various exciting conditions was used to determine the structure of the different polymorphs (Types I and II), which was correlated with the process. Structure #I is observed at the surface preferentially. Partial surface de-protonation and formation of quinoic segments with special geometry are evidenced.