Polyaniline-tungsten oxide metacomposites with tunable electronic properties

Jiahua Zhu; Suying Wei; Lei Zhang; Yuanbing Mao; Jongeun Ryu; Amar B. Karki; David P. Young; Zhanhu Guo

doi:10.1039/c0jm02090g

Polyaniline-tungsten oxide metacomposites with tunable electronic properties

Jiahua Zhu, Suying Wei, Lei Zhang, Yuanbing Mao, Jongeun Ryu, Amar B. Karki, David P. Young, Zhanhu Guo

Research output: Contribution to journal › Article › peer-review

164 Scopus citations

Abstract

Polyaniline (PANI) nanocomposites reinforced with tungsten oxide (WO ₃) nanoparticles (NPs) and nanorods (NRs) are fabricated via a facile surface-initiated-polymerization (SIP) method. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterizations reveal the uniform coating of polymer on the filler surface and a good dispersion of the nanofillers within the polymer matrix. Unique negative permittivity is observed in pure PANI and its nanocomposites. The switching frequency (frequency where real permittivity switches from negative to positive) can be easily tuned by changing the particle loading and filler morphology. Conductivity measurements are performed from 50∼290 K, and results show that the electron transportation in the nanocomposites follows a quasi 3-d variable range hopping (VRH) conduction mechanism. The extent of charge carrier delocalization calculated from VRH well explains the dielectric response of the metacomposites. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) reveal an enhanced thermal stability of the nanocomposites with the addition of nanofillers as compared to that of pure PANI.

Original language	English
Pages (from-to)	342-348
Number of pages	7
Journal	Journal of Materials Chemistry
Volume	21
Issue number	2
DOIs	https://doi.org/10.1039/c0jm02090g
State	Published - 14 Jan 2011
Externally published	Yes

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title = "Polyaniline-tungsten oxide metacomposites with tunable electronic properties",

abstract = "Polyaniline (PANI) nanocomposites reinforced with tungsten oxide (WO 3) nanoparticles (NPs) and nanorods (NRs) are fabricated via a facile surface-initiated-polymerization (SIP) method. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterizations reveal the uniform coating of polymer on the filler surface and a good dispersion of the nanofillers within the polymer matrix. Unique negative permittivity is observed in pure PANI and its nanocomposites. The switching frequency (frequency where real permittivity switches from negative to positive) can be easily tuned by changing the particle loading and filler morphology. Conductivity measurements are performed from 50∼290 K, and results show that the electron transportation in the nanocomposites follows a quasi 3-d variable range hopping (VRH) conduction mechanism. The extent of charge carrier delocalization calculated from VRH well explains the dielectric response of the metacomposites. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) reveal an enhanced thermal stability of the nanocomposites with the addition of nanofillers as compared to that of pure PANI.",

author = "Jiahua Zhu and Suying Wei and Lei Zhang and Yuanbing Mao and Jongeun Ryu and Karki, {Amar B.} and Young, {David P.} and Zhanhu Guo",

year = "2011",

month = jan,

day = "14",

doi = "10.1039/c0jm02090g",

language = "英语",

volume = "21",

pages = "342--348",

journal = "Journal of Materials Chemistry",

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publisher = "Royal Society of Chemistry",

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}

TY - JOUR

T1 - Polyaniline-tungsten oxide metacomposites with tunable electronic properties

AU - Zhu, Jiahua

AU - Wei, Suying

AU - Zhang, Lei

AU - Mao, Yuanbing

AU - Ryu, Jongeun

AU - Karki, Amar B.

AU - Young, David P.

AU - Guo, Zhanhu

PY - 2011/1/14

Y1 - 2011/1/14

N2 - Polyaniline (PANI) nanocomposites reinforced with tungsten oxide (WO 3) nanoparticles (NPs) and nanorods (NRs) are fabricated via a facile surface-initiated-polymerization (SIP) method. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterizations reveal the uniform coating of polymer on the filler surface and a good dispersion of the nanofillers within the polymer matrix. Unique negative permittivity is observed in pure PANI and its nanocomposites. The switching frequency (frequency where real permittivity switches from negative to positive) can be easily tuned by changing the particle loading and filler morphology. Conductivity measurements are performed from 50∼290 K, and results show that the electron transportation in the nanocomposites follows a quasi 3-d variable range hopping (VRH) conduction mechanism. The extent of charge carrier delocalization calculated from VRH well explains the dielectric response of the metacomposites. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) reveal an enhanced thermal stability of the nanocomposites with the addition of nanofillers as compared to that of pure PANI.

AB - Polyaniline (PANI) nanocomposites reinforced with tungsten oxide (WO 3) nanoparticles (NPs) and nanorods (NRs) are fabricated via a facile surface-initiated-polymerization (SIP) method. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterizations reveal the uniform coating of polymer on the filler surface and a good dispersion of the nanofillers within the polymer matrix. Unique negative permittivity is observed in pure PANI and its nanocomposites. The switching frequency (frequency where real permittivity switches from negative to positive) can be easily tuned by changing the particle loading and filler morphology. Conductivity measurements are performed from 50∼290 K, and results show that the electron transportation in the nanocomposites follows a quasi 3-d variable range hopping (VRH) conduction mechanism. The extent of charge carrier delocalization calculated from VRH well explains the dielectric response of the metacomposites. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) reveal an enhanced thermal stability of the nanocomposites with the addition of nanofillers as compared to that of pure PANI.

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U2 - 10.1039/c0jm02090g

DO - 10.1039/c0jm02090g

M3 - 文章

AN - SCOPUS:78650360099

SN - 0959-9428

VL - 21

SP - 342

EP - 348

JO - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

IS - 2

ER -

Polyaniline-tungsten oxide metacomposites with tunable electronic properties

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