The Intrinsic Conductivity of the Metallic Phase of Conducting Polymers

导电聚合物金属相的本征电导率

• 批准号: 9508723
• 负责人: Arthur Epstein
• 金额: --
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-12-01 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9508723&HistoricalAwards=false
• 关键词: Intrinsic; Conductivity; Metallic; Phase; Conducting

Abstract 9508723 Epstein The objective of this research is to explore electrically conducting polymers. Despite the extensive studies there are many open questions concerning the correct description of the metallic state of the various conducting polymers and the determination of the ultimately achievable conductivity of each of these families of conducting polymers. In this research, an extensive array of correlated charge transport, magnetic and optical studies of highly conducting polymers (including doped polythiophenes, doped polypyrroles and doped polyanilines) is planned. In addition to traditional experiments such as electrical conductivity, thermopower, and susceptibility, frequency-dependent studies will be emphasized to gain insight into microscopic processes. The dielectric constant and conductivity will be obtained at microwave frequencies and also from the far ir to the uv. For the first time synchrotron radiation will be used to span the important region between the microwave and the far ir. Where appropriate, experiments will be conducted at very high magnetic fields or very low temperatures. Correlation of the results of these studies with structural and compositional information of the different polymer systems should elucidate the design criteria for creating truly metallic polymers, some with conductivities even exceeding that of copper. %%% Electrically conducting polymers have been studied for the past 1.5 decades. Highly conducting polymer materials have expanded from doped polyacetylene to include also doped polypyrrole, doped polythiophene, doped polyaniline, and their many derivatives and related polymers. There continue to be important advances in these materials and their understanding. Initially, these systems were only modestly good conductors, and, in fact, became insulators at low temperatures. The present generation of materials have conductivities in the range of that of traditional metals. This new generation of conduct ing polymers share other properties in common with traditional metals (such as a negative dielectric constant). Despite the extensive studies there are many open questions concerning the correct description of the metallic state of the various conducting polymers and the determination of the ultimately achievable conductivity of each of these families of conducting polymers. These issues are the subject of this research. Success in this research program would have an impact in the understanding of electronic polymers, nanostructured materials, and concepts of localization, delocalization, and electronic properties in reduced dimensions. Also, development of a fundamental understanding of the metallic state will impact the implementation of metallic polymers in technologies ranging from electromagnetic interference shielding to molecular manufacturing, to improved environmentally friendly materials for ease of recycling.

摘要 小行星9508723 本研究的目的是探索导电聚合物。尽管有广泛的研究，有许多悬而未决的问题有关的正确描述的金属状态的各种导电聚合物和最终实现的导电性的测定这些家庭的导电聚合物。在本研究中，计划对高导电聚合物（包括掺杂聚噻吩、掺杂聚吡咯和掺杂聚苯胺）的相关电荷输运、磁性和光学进行广泛的研究。除了传统的实验，如电导率，热电势和磁化率，频率依赖性的研究将被强调，以深入了解微观过程。介电常数和电导率将在微波频率下以及从远红外到紫外得到。同步辐射将首次用于跨越微波和远红外之间的重要区域。在适当的情况下，实验将在非常高的磁场或非常低的温度下进行。这些研究的结果与不同聚合物系统的结构和组成信息的相关性应该阐明用于创建真正的金属聚合物的设计标准，其中一些聚合物的导电性甚至超过铜。 导电聚合物在过去的1.5年里一直在研究。高导电聚合物材料已经从掺杂的聚乙炔扩展到还包括掺杂的聚吡咯、掺杂的聚噻吩、掺杂的聚苯胺以及它们的许多衍生物和相关聚合物。在这些材料及其理解方面继续取得重要进展。最初，这些系统只是适度的良导体，事实上，在低温下成为绝缘体。目前这一代材料的电导率在传统金属的范围内。这种新一代的导电聚合物与传统金属有着共同的特性（如负介电常数）。 尽管有广泛的研究，有许多悬而未决的问题有关的正确描述的金属状态的各种导电聚合物和最终实现的导电性的测定这些家庭的导电聚合物。这些问题是本研究的主题。这项研究计划的成功将对电子聚合物，纳米结构材料，以及局部化，离域化和电子特性的概念的理解产生影响。此外，对金属状态的基本理解的发展将影响金属聚合物在从电磁干扰屏蔽到分子制造的技术中的应用，以及改善环境友好材料以便于回收。