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- W2034342899 abstract "The electrical conduction mechanism of polypyrrole films containing various counter ions was investigated. Above 100 K the temperature dependence of electrical conductivity obeyed the Mott equation based on variable range hopping. The exponential factor (To) increased as the size of counter ion increased, while the pre-exponential factor (Ko) was independent of the size. The enhancement of conductivity (σ∣) in the stretch direction upon stretching was explained by the increase of the hopping attempt frequency (νo). The temperature dependence of the conductivity of the films containing small counter ions fitted well the Sheng equation from room temperature down to 10 K suggesting that the conduction is dominated more strongly by tunneling than by hopping in a lower temperature region. The conductivity of a film containing PF6− showed a metallic-like temperature dependence below 20 K where the apparent magnetoresistance was positive." @default.
- W2034342899 created "2016-06-24" @default.
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- W2034342899 date "1991-03-01" @default.
- W2034342899 modified "2023-10-14" @default.
- W2034342899 title "Study on the electrical conduction mechanism of polypyrrole films" @default.
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- W2034342899 doi "https://doi.org/10.1016/0379-6779(91)91487-u" @default.
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