Metal to insulator transition in conducting polyaniline/graphene oxide composites
| Autor: | Elias Sakellis, S. Sakkopoulos, Eleni Neti, Evangelos Vitoratos, Anthony N. Papathanassiou |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Conductive polymer Condensed Matter - Materials Science Materials science Nanocomposite Physics and Astronomy (miscellaneous) Graphene Annealing (metallurgy) Oxide Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Insulator (electricity) 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences law.invention chemistry.chemical_compound chemistry law 0103 physical sciences Polyaniline Composite material Metal–insulator transition 0210 nano-technology |
| Zdroj: | Applied Physics Letters. 114:162904 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.5089814 |
| Popis: | Broadband Dielectric Spectroscopy (BDS) measurements of P{\omicron}lyaniline/Graphene oxide composites were conducted for an as-prepared and a thermally annealed specimen, respectively, from 15K to room temperature. Electrical conductivity values of the annealed composite display a very modest rise denoting the important contributions of the GO component to achieving electrical stability of the polymer. Patterns of the dc conductivity as a function of temperature also reveal a metal to insulator transition around 75K. The transition is dominated by two key factors; temperature and annealing process. Metal-like and insulating features are subsequently detected, as well, and accordingly described to provide a qualitative inspection of the charge transfer mechanisms involved Comment: Applied Physics Letters (accepted) |
| Databáze: | OpenAIRE |
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