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Ion transport in thin polypyrrole films.

机译:聚吡咯薄膜中的离子传输。

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摘要

Fundamental and applied aspects of ion transport in polypyrrole films are investigated. In this context, three objectives have been accomplished: (i) Composites of polypyrrole and a porous host membrane have been prepared which possess superior mechanical properties to the homogeneous polymer, but which retain its desirable electrochemical characteristics. (ii) Two new electrochemical methods for quantitating ion transport in polypyrrole films are demonstrated. The small amplitude nature of both experiments minimizes the perturbation of the polymer redox state. These techniques circumvent many of the problems associated with the determination of diffusion coefficients in conducting polymers with conventional large amplitude electrochemical methods. (iii) A technique for synthesizing polypyrrole films possessing a well defined "fibrillar-microporous" (F/MP) morphology which facilitates ion transport is developed. Controlled morphology films prepared using this new method are electrochemically characterized.; The generality of this electrochemical method for preparing highly structured surfaces is demonstrated by depositing platinum structures with the same well-defined F/MP geometry. A modification of this procedure is used to prepare ultramicroelectrode ensembles (UME). UME's have electroanalytical applications since the signal-to-noise ratios for such electrodes are enhanced relative to those obtained at electrodes with conventional dimensions.
机译:研究了聚吡咯膜中离子传输的基础和应用方面。在此背景下,已经实现了三个目的:(i)已经制备了具有比均相聚合物优越的机械性能,但是保留了其期望的电化学特性的聚吡咯和多孔主体膜的复合物。 (ii)展示了两种新的定量聚吡咯膜中离子迁移的电化学方法。两个实验的小幅度性质使聚合物氧化还原态的扰动最小化。这些技术规避了许多与常规大振幅电化学方法在导电聚合物中确定扩散系数有关的问题。 (iii)开发了一种合成聚吡咯膜的技术,该聚吡咯膜具有定义明确的“原纤维-微孔”(F / MP)形态,其有助于离子迁移。用这种新方法制备的可控形态薄膜经过电化学表征。通过沉积具有相同明确定义的F / MP几何形状的铂结构,可以证明这种用于制备高度结构化表面的电化学方法的普遍性。对该程序的修改用于制备超微电极组件(UME)。 UME具有电分析应用,因为相对于具有常规尺寸的电极而言,此类电极的信噪比得到了提高。

著录项

  • 作者

    Penner, Reginald Mark.;

  • 作者单位

    Texas A&M University.;

  • 授予单位 Texas A&M University.;
  • 学科 Chemistry Analytical.
  • 学位 Ph.D.
  • 年度 1987
  • 页码 296 p.
  • 总页数 296
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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