Unusual Dielectric Properties of Electrochromic Polydipyridinium Triflate Composites with Carbon Nanotubes
| Autor: | Inna A. Malyshkina, Roman D. Pichugov, Elena E. Makhaeva |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Permittivity
Nanocomposite Materials science 010308 nuclear & particles physics General Physics and Astronomy Dielectric Carbon nanotube Conductivity 01 natural sciences law.invention Electrochromism law Electric field 0103 physical sciences Composite material 010306 general physics Trifluoromethanesulfonate |
| Zdroj: | Moscow University Physics Bulletin. 75:153-157 |
| ISSN: | 1934-8460 0027-1349 |
| Popis: | The dielectric properties of electrochromic composite material based on poly[4,4’-(1,4-phenylene)bis(2,6-diphenylpyridinium)triflate] (PV) and multi-wall carbon nanotubes (MWCNTs) have been studied. Negative permittivity was registered at low frequencies of the alternating electric field ( $$10^{-1}{-}10^{3}$$ Hz) in the PV/MWCNT nanocomposites of different composition. The frequency of transition from negative to positive permittivity, as well as the values of conductivity, increased in the case of application of direct-current (dc) voltage. The physical mechanism responsible for the unusual properties appears to be related to the delocalized charges located at the multiple insulator–conductor interfaces. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink