Unusual Dielectric Properties of Electroсhromic Polydipyridinium Triflate Composites with Carbon Nanotubesстатья
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Дата последнего поиска статьи во внешних источниках: 24 сентября 2020 г.
Аннотация:Dielectric properties of electrochromic composite material based on poly(4,4'-(1,4-phenylene)bis(2,6-diphenylpyridinium) triflate) (PV) and multiwall carbon nanotubes (MWCNTs) have been studied. Negative dielectric permittivity was registered in low frequency range (10^(-1) – 10^3 Hz) in PV/MWCNT nanocomposites of different composition. The transition frequency from positive to negative dielectric permittivity, as well as the values of conductivity, increased after the application of dc bias field. The physical mechanism responsible for the unusual properties appears to be related to the delocalized charges located at the multiple insulator–conductor interfaces.