Low-temperature magnetoresistance studies on composite films of conducting polymer and multiwalled carbon nanotubes

被引：28

作者：

Long, Y. Z. ^{[1
]}

Yin, Z. H. ^{[1
]}

Chen, Z. J. ^{[2
]}

机构：

[1] Qingdao Univ, Coll Phys Sci, Qingdao 266071, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 30期

关键词：

D O I：

10.1021/jp709872k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report on low-temperature electrical conductivity and magnetoresistance (MR) measurements on composite films of conducting polyaniline (PANI) and multimalled carbon nanotubes (CNT). The conductivity below 150 K follows Mott's variable-range-hopping model in three dimensions. The MR of the CNT/PANI composite films is strongly dependent on temperature, magnetic field, and CNT loading. Evident transition from negative to positive MR was observed with lowering temperature, increasing magnetic field, or decreasing CNT loading. The positive and negative MR is discussed in terms of a wave function-shrinkage effect and a quantum interference effect on hopping conduction.

引用

页码：11507 / 11512

页数：6

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