Effect of structural anisotropy on electrical and magnetic properties of polyaniline conducting films

被引：3
作者：
Fedorko, P. [1 ,2 ,3 ]
Faure-Vincent, J. [2 ,3 ]
Fier, I. [4 ]
Walmsley, L. [4 ]
Sniechowski, M. [5 ]
Jacquot, J. F. [2 ,3 ]
Pron, A. [2 ,3 ,6 ]
Travers, J. P. [2 ,3 ]
Djurado, D. [2 ,3 ]
机构：
[1] Slovak Univ Technol Bratislava, Fac Chem & Food Technol, Dept Chem Phys, SK-81237 Bratislava, Slovakia
[2] CEA Grenoble, Inst Nanosci & Cryogenie, SPrAM, CEA CNRS UJF,UMR5819, F-38054 Grenoble 9, France
[3] CEA Grenoble, SCIB, F-38054 Grenoble 9, France
[4] Univ Estadual Paulista UNESP, Inst Geociencias & Ciencias Exatas, Dept Fis, BR-13500970 Sao Paulo, Brazil
[5] AGH Univ Sci & Technol, Fac Phys, PL-30059 Krakow, Poland
[6] Warsaw Univ Technol, Fac Chem, PL-00664 Warsaw, Poland
来源：
SYNTHETIC METALS | 2013年 / 166卷
基金：
巴西圣保罗研究基金会;
关键词：
Polyaniline; Anisotropy; Structure; Conductivity; Magnetic properties; DOPED POLYACETYLENE; PLASTICIZING DOPANTS; METALLIC STATE; SULFONIC-ACID; TRANSPORT; POLYPYRROLE; SURFACTANT; COMPLEXES;
D O I：
10.1016/j.synthmet.2013.01.017
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
It 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. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：63 / 69
页数：7
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