Issue 2, 2011
From the journal:

Journal of Materials Chemistry

Polyaniline-tungsten oxide metacomposites with tunable electronic properties†

Jiahua Zhu,a   Suying Wei,*b   Lei Zhang,a   Yuanbing Mao,c   Jongeun Ryu,d   Amar B. Karki,e   David P. Younge  and  Zhanhu Guo*a  

* Corresponding authors

a Integrated Composites Laboratory (ICL), Dan F Smith Department of Chemical Engineering, Lamar University, Beaumont, TX, USA
E-mail: zhanhu.guo@lamar.edu
Tel: +1 409 880-7654

b Department of Chemistry and Biochemistry, Lamar University, Beaumont, TX, USA
E-mail: suying.wei@lamar.edu
Tel: +1 409 880-7976

c Applied Sciences laboratory, Washington State University, Spokane, WA, USA

d Department of Mechanical & Aerospace Engineering, University of California Los Angeles, Los Angeles, CA, USA

e Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA, USA

Abstract

Polyaniline (PANI) nanocomposites reinforced with tungsten oxide (WO3) 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.

Graphical abstract: Polyaniline-tungsten oxide metacomposites with tunable electronic properties

About
Cited by
Related
Download options Please wait...

Supplementary files

Article information

DOI
https://doi.org/10.1039/C0JM02090G
Article type
Paper
Submitted
02 Jul 2010
Accepted
05 Oct 2010
First published
21 Oct 2010

J. Mater. Chem., 2011,21, 342-348

Permissions

Request permissions

Polyaniline-tungsten oxide metacomposites with tunable electronic properties

J. Zhu, S. Wei, L. Zhang, Y. Mao, J. Ryu, A. B. Karki, D. P. Young and Z. Guo, J. Mater. Chem., 2011, 21, 342 DOI: 10.1039/C0JM02090G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements