Magnetoresistive conductive polymer-tungsten trioxide nanocomposites with ultrahigh sensitivity at low magnetic field

Hongbo Gu; Jiang Guo; Huige Wei; Xi Zhang; Jiahua Zhu; Lu Shao; Yudong Huang; Neel Haldolaarachchige; David P. Young; Suying Wei; Zhanhu Guo

doi:10.1016/j.polymer.2013.12.024

Magnetoresistive conductive polymer-tungsten trioxide nanocomposites with ultrahigh sensitivity at low magnetic field

Hongbo Gu, Jiang Guo, Huige Wei, Xi Zhang, Jiahua Zhu, Lu Shao, Yudong Huang, Neel Haldolaarachchige, David P. Young, Suying Wei, Zhanhu Guo

科研成果: 期刊稿件 › 文章 › 同行评审

24 引用（Scopus）

摘要

The effect of conductive polymer matrix including polyaniline (PANI) and polypyrrole (PPy) on the magnetoresistance (MR) behaviors in the variable range hopping (VRH) regime has been investigated in the disordered polymer nanocomposites containing tungsten trioxide (WO₃) nanoparticles. These nanocomposites have demonstrated ultrahigh MR sensitivity at low magnetic field regime. The observed positive MR has been well explained by the wave-function shrinkage model. The conductive polymer matrix has shown different effects on the MR behaviors of the nanocomposites. The WO₃/PANI nanocomposites have a lower localization length (a₀) and density of states at the Fermi level (N(E_F)), and higher average hopping distance (R_hop) and average hopping energy (W) compared with those of the WO₃/PPy nanocomposites.

源语言	英语
页（从-至）	944-950
页数	7
期刊	Polymer
卷	55
期	3
DOI	https://doi.org/10.1016/j.polymer.2013.12.024
出版状态	已出版 - 12 2月 2014
已对外发布	是

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title = "Magnetoresistive conductive polymer-tungsten trioxide nanocomposites with ultrahigh sensitivity at low magnetic field",

abstract = "The effect of conductive polymer matrix including polyaniline (PANI) and polypyrrole (PPy) on the magnetoresistance (MR) behaviors in the variable range hopping (VRH) regime has been investigated in the disordered polymer nanocomposites containing tungsten trioxide (WO3) nanoparticles. These nanocomposites have demonstrated ultrahigh MR sensitivity at low magnetic field regime. The observed positive MR has been well explained by the wave-function shrinkage model. The conductive polymer matrix has shown different effects on the MR behaviors of the nanocomposites. The WO3/PANI nanocomposites have a lower localization length (a0) and density of states at the Fermi level (N(EF)), and higher average hopping distance (Rhop) and average hopping energy (W) compared with those of the WO3/PPy nanocomposites.",

keywords = "Electron transport, Magnetoresistance, Non-magnetic conductive polymer nanocomposites",

author = "Hongbo Gu and Jiang Guo and Huige Wei and Xi Zhang and Jiahua Zhu and Lu Shao and Yudong Huang and Neel Haldolaarachchige and Young, {David P.} and Suying Wei and Zhanhu Guo",

year = "2014",

month = feb,

day = "12",

doi = "10.1016/j.polymer.2013.12.024",

language = "英语",

volume = "55",

pages = "944--950",

journal = "Polymer",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Magnetoresistive conductive polymer-tungsten trioxide nanocomposites with ultrahigh sensitivity at low magnetic field

AU - Gu, Hongbo

AU - Guo, Jiang

AU - Wei, Huige

AU - Zhang, Xi

AU - Zhu, Jiahua

AU - Shao, Lu

AU - Huang, Yudong

AU - Haldolaarachchige, Neel

AU - Young, David P.

AU - Wei, Suying

AU - Guo, Zhanhu

PY - 2014/2/12

Y1 - 2014/2/12

N2 - The effect of conductive polymer matrix including polyaniline (PANI) and polypyrrole (PPy) on the magnetoresistance (MR) behaviors in the variable range hopping (VRH) regime has been investigated in the disordered polymer nanocomposites containing tungsten trioxide (WO3) nanoparticles. These nanocomposites have demonstrated ultrahigh MR sensitivity at low magnetic field regime. The observed positive MR has been well explained by the wave-function shrinkage model. The conductive polymer matrix has shown different effects on the MR behaviors of the nanocomposites. The WO3/PANI nanocomposites have a lower localization length (a0) and density of states at the Fermi level (N(EF)), and higher average hopping distance (Rhop) and average hopping energy (W) compared with those of the WO3/PPy nanocomposites.

AB - The effect of conductive polymer matrix including polyaniline (PANI) and polypyrrole (PPy) on the magnetoresistance (MR) behaviors in the variable range hopping (VRH) regime has been investigated in the disordered polymer nanocomposites containing tungsten trioxide (WO3) nanoparticles. These nanocomposites have demonstrated ultrahigh MR sensitivity at low magnetic field regime. The observed positive MR has been well explained by the wave-function shrinkage model. The conductive polymer matrix has shown different effects on the MR behaviors of the nanocomposites. The WO3/PANI nanocomposites have a lower localization length (a0) and density of states at the Fermi level (N(EF)), and higher average hopping distance (Rhop) and average hopping energy (W) compared with those of the WO3/PPy nanocomposites.

KW - Electron transport

KW - Magnetoresistance

KW - Non-magnetic conductive polymer nanocomposites

UR - http://www.scopus.com/inward/record.url?scp=84895061668&partnerID=8YFLogxK

U2 - 10.1016/j.polymer.2013.12.024

DO - 10.1016/j.polymer.2013.12.024

M3 - 文章

AN - SCOPUS:84895061668

SN - 0032-3861

VL - 55

SP - 944

EP - 950

JO - Polymer

JF - Polymer

IS - 3

ER -

Magnetoresistive conductive polymer-tungsten trioxide nanocomposites with ultrahigh sensitivity at low magnetic field

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