Structural and electrical characterization of polyanilines synthesized from chemical oxidative polymerization via doping/de-doping/re-doping processes

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题名:	Structural and electrical characterization of polyanilines synthesized from chemical oxidative polymerization via doping/de-doping/re-doping processes
作者:	楊仲準;Tang, Shiow-Jing;Lin, Ku-Yen;Zhu, Yun-Rong;Huang, Hsiu-Ying;Ji, Wei-Fu;Yang, Chun-Chuen;Chao, Yu-Chiang;Yeh, Jui-Ming;Chiu, Kuan-Cheng
贡献者:	理學院物理學系
关键词:	Applied sciences;Charge carrier hopping;Chemical oxidative polymerization;Condensed matter: electronic structure, electrical, magnetic, and optical properties;Condensed matter: structure, mechanical and thermal properties;Crystallinity;De-doping and re-doping effects;Electrical conductivity;Electrical resistivity;Electrical, magnetic and optical properties;Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures;Electronic transport in multilayers, nanoscale materials and structures;Exact sciences and technology;Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties;Nanostructure;Organic polymers;Pellets;Physicochemistry of polymers;Physics;Polyanilines;Polymerization;Properties and characterization;Resistivity;Structural analysis;Surfaces and interfaces;thin films and whiskers (structure and nonelectronic properties);Texts
日期:	2013-12-18
上传时间:	2026-04-23 14:27:46 (UTC+8)
出版者:	IOP Publishing Ltd.;Bristol: IOP Publishing
摘要:	摘要： Structural characterization of various emeraldine salt (ES) and emeraldine base (EB) polyaniline (PANI) powders synthesized from chemical oxidative polymerization and then via de-doping and re-doping processes is first presented. Partial crystallinity with well-separated x-ray diffraction peaks is observed in the as-prepared ES PANI powder and an amorphous characteristic is identified in the de-doped EB PANI powder. From scanning electron microscopy, both the nanostructures of the as-prepared ES and de-doped EB PANI precipitated powders possess similar morphology. This finding reveals that the de-doping process to remove the counter-ions intercalated between the as-prepared ES PANI chains makes the de-doped EB PANI pieces become soft but does not change the nanostructures significantly. Then, the electrical conductivity perpendicular to the surface of the pressed PANI disc pellets is studied. The re-doped ES PANI pellets possess less electrical conductivity than their as-prepared counterparts, which suggests that during the re-doping process the counter-ions (Cl− or ) are re-adsorbed predominantly on the surface region of the PANI nanostructures. Besides, the re-doping of larger counter-ions (with respect to Cl−) intercalated between the PANI chains increases the d-spacing of (1 0 0) planes and hence reduces the corresponding π-π inter-chain interaction. Finally, from the temperature dependence of the electrical conductivity together with the structural information, the charge carrier hopping mechanisms perpendicular to the surface of the pressed pellets corresponding to various PANI samples are compared and discussed. 其他題名： JPhysD 其他題名： J. Phys. D: Appl. Phys 出版者： Bristol: IOP Publishing 出版日期： 2013-12-18 出處： Journal of physics. D, Applied physics, 2013-12, Vol.46 (50), p.505301-8 資源來源： Institute of Physics Journals 版權： 2013 IOP Publishing Ltd 版權： 2015 INIST-CNRS 識別號： ISSN: 0022-3727 識別號： EISSN: 1361-6463 識別號： DOI: 10.1088/0022-3727/46/50/505301 識別號： CODEN: JPAPBE
显示于类别:	[物理學系] 期刊論文

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