Effect of structural anisotropy on electrical and magnetic properties of polyaniline conducting films
P. Fedorko , J. Faure-Vincent , I. Fier , L. Walmsley , M. Sniechowski , J.F. Jacquot , Adam Proń , J.P. Travers , D. Djurado
AbstractIt is shown that highly conducting films of polyaniline protonated with di-esters of sulfosuccinic and sulfophthalic acids which contain alkyl- or alkoxy-type substituents exhibit highly anisotropic structural, electrical and magnetic properties. The layered-like structure of these films can be described as consisting of polyaniline chains which are mainly oriented parallel to the plane of the film and form regular out-of-plane stacks. These stacks are separated by bilayers of the dopant anions. Accordingly, the main anisotropy observed for solution cast films implies in-plane and out-of-plane measurements. An electrical anisotropy of about 80 is found for the in-plane and out-of-plane electronic conductivities at 5 K. The temperature dependences of the in-plane and out-of-plane conductivities are qualitatively similar and have been fitted as a series combination of variable-range-hopping-type and power law contributions. A maximum is observed in the temperature dependence of the electrical anisotropy at low temperature. The films also show a clear anisotropy of magnetization whose temperature and field characteristics depend on the chemical structure of the dopant anion. © 2013 Elsevier B.V.
|Journal series||Synthetic Metals, ISSN 0379-6779|
|Publication size in sheets||0.5|
|Keywords in English||polyaniline ; anisotropy ; structure ; conductivity ; magnetic properties|
|ASJC Classification||; ; ; ; ;|
|Score|| = 30.0, 07-01-2020, ArticleFromJournal|
= 30.0, 07-01-2020, ArticleFromJournal
|Publication indicators||= 1; = 1; : 2014 = 0.943; : 2013 = 2.222 (2) - 2013=2.256 (5)|
|Citation count*||3 (2020-04-08)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.