Electric-field-induced metastable state of electrical conductivity in polyaniline nanoparticles polymerized in nanopores of a MIL-101 dielectric matrix

A. I. Romanenko, D. N. Dybtsev, V. P. Fedin, S. B. Aliev, K. M. Limaev

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Conducting polyaniline PANI has been obtained inside dielectric nanoporous coordination polymer MIL-101. The application of an electric field transforms both bulk PANI and nanocomposite PANI@MIL to a metastable high-conductive state. After a decrease in the applied electric field, PANI and PANI@MIL relax toward a state low-conductive stable by the law ln[σ(t)/σ(τ)] = −(t/τ)n, which is typical of disordered systems with the characteristic time τ of about six hours for PANI and with three times larger time for composite PANI@MIL. The temperature dependences of the electrical conductivity σ(T) of the samples in both high- and low-ohmic states are described by the fluctuation-induced conductivity model. Significant changes in relaxation processes and in the parameters of the fluctuation-induced tunneling conduction in nanocomposite PANI@MIL are due to a decrease in the sizes of polyaniline particles in the MIL-101 matrix to nanometers.

Original languageEnglish
Pages (from-to)57-60
Number of pages4
JournalJETP Letters
Volume101
Issue number1
DOIs
Publication statusPublished - 1 Jan 2015
Externally publishedYes

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