Tunable positive magnetoresistance of magnetic polyaniline nanocomposites

Jiang Guo, Zhuoran Chen, Waras Abdul, Jie Kong, Mojammel A. Khan, David P. Young, Jianfeng Zhu, Zhanhu Guo

科研成果: 期刊稿件文章同行评审

90 引用 (Scopus)

摘要

Tunable positive magnetoresistance (MR) of polyaniline (PANI) nanocomposites with different magnetic nanoparticles (Fe3O4 or CoFe2O4) have been prepared through the facile surface-initiated polymerization (SIP) method. The characterizations including Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM) indicate that the magnetic nanoparticles were successfully coated by PANI. A quasi 3D variable range hopping (VRH) mechanism was observed in the magnetic PANI nanocomposites through Mott VRH model. The effects of magnetic field and magnetic nanoparticle on the charge carrier’s behavior were studied by the wave function shrinkage model. The localization length and average hopping length decrease with increasing magnetic field, while the density of state at the Fermi level increases with increasing magnetic field. The enhanced dielectric property and magnetic property of the magnetic PANI nanocomposites were reported as well. Graphical abstract: Magnetic polyaniline nanocomposites with tunable positive magnetoresistance. [Figure not available: see fulltext.].

源语言英语
页(从-至)534-542
页数9
期刊Advanced Composites and Hybrid Materials
4
3
DOI
出版状态已出版 - 9月 2021

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