Anomalous electrical behavior of partially carbonized polyacrylonitrile fibers

Author:

Jang Bor Z.,Zhao Liren

Abstract

Partially carbonized polyacrylonitrile fibers were observed to undergo a resistivity change of 2 to 4 orders of magnitude at a transition temperature typically in the range of 98 °C to 200 °C. The current-voltage curves exhibited an initial supercurrent-like increase, followed by a rapid drop to a high resistance state, and then a rise in current again at a later stage. These phenomena cannot be interpreted by existing theories on switching in inorganic amorphous semiconductors. They are explainable if the microstructure of the pyrolyzed fiber is viewed as comprising nanometer-scale superconducting phases interspersed with semiconducting phases, much like a large number of Josephson junctions connected in series.

Publisher

Springer Science and Business Media LLC

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Cited by 6 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Traces of superconducting correlations in nanographite films;Journal of Materials Science: Materials in Electronics;2020-10-16

2. Field-effect switching in nano-graphite films;Journal of Physics and Chemistry of Solids;2014-09

3. Nanographite Films for Solid State Electronic Applications;Advances in High Energy Physics;2013

4. Polyacrylonitrile-based nanofibers—A state-of-the-art review;Progress in Polymer Science;2012-03

5. Effect of polymeric precursors on properties of semiconducting carbon/carbon composites;Journal of Materials Science;1998-04

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