Open AccessElectrical conductivity of polyazomethine/reduced graphene oxide nanocomposites
Author(s) -
Sergei Kostromin,
Aleksandr Podshivalov,
Mihai Asăndulesa,
Sergei Bronnikov
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/634/1/012005
Subject(s) - graphene , materials science , electrical resistivity and conductivity , oxide , nanocomposite , conductivity , composite material , nanotechnology , chemistry , electrical engineering , metallurgy , engineering
We produced nanocomposites comprised of polyazomethine and reduced graphene oxide by solution mixing. The nanofiller concentration ranged from 0.25 to 1.5 wt.%. Both neat polymer and nanocomposites samples were investigated using broadband dielectric spectrometry under the same conditions. The electrical conductivity σ of the samples was examined as a complex value being a combination of two parameters: dc conductivity ( σ dc ) and ac conductivity ( σ ac ). The temperature dependences of σ ac were found to follow the Arrhenius equation, whereas the frequency dependences of σ ac were shown to obey a power law. We proposed that the correlated barrier hopping could explain behaviour of σ ac of the nanocomposites under study.