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New analytical approach to the insulator–metal transition in conductive polyaniline

机译:导电聚苯胺中绝缘体-金属过渡的新分析方法

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摘要

A new empirical formula describing the temperature dependence of the conductivity of polyaniline films in the metallic regime close to the insulator–metal transition at temperature below 30K is deduced from the analysis of the temperature dependence of the reduced activation energy. Its elaboration is based on a careful study of electrical transport properties of camphorsulfonic acid-doped polyaniline (PANI(CSA)_(0.5)) films, containing increasing amounts of triphenyl phosphate (TPP) plasticizer. The use of this three component system (polymer, protonating agent, plasticizer) and control of the amount of adsorbed water enable precise tuning of the electrical transport properties in the solution cast films, in this manner providing the set of experimental data, covering the insulating, critical and metallic regimes, necessary for the elaboration of the proposed new empirical formula.
机译:通过对降低的活化能的温度依赖性进行分析,得出了一个新的经验公式,该公式描述了在接近30K的温度下接近绝缘体-金属转变的金属状态下,聚苯胺薄膜的电导率对温度的依赖性。它的详细说明是基于对樟脑磺酸掺杂的聚苯胺(PANI(CSA)_(0.5))薄膜的电传输性质的仔细研究,该薄膜包含越来越多的磷酸三苯酯(TPP)增塑剂。通过使用这三种组分系统(聚合物,质子化剂,增塑剂)并控制吸附的水量,可以精确调节溶液流延薄膜中的电传输性能,从而提供一组涵盖绝缘材料的实验数据,关键和金属制度,对于拟议的新经验公式的拟订是必不可少的。

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