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Published in: Journal of Nanoparticle Research 5/2011

01-05-2011 | Research Paper

Dielectric behaviour of emeraldine base polymer–ZnO nanocomposite film in the low to medium frequency

Authors: M. L. Singla, Rajeev Sehrawat, Nidhi Rana, Kulvir Singh

Published in: Journal of Nanoparticle Research | Issue 5/2011

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Abstract

Emeraldine base (EB) polymer–ZnO nanoparticles composite films has been synthesized by solution casting technique on ITO-coated glass substrate and characterized by XRD, FTIR and TEM for their structure and morphology. Dielectric behaviour of these composite films has been investigated in the very low frequency region to medium frequency region (1 kHz–1 MHz). The dielectric constant of the composite with 30% nanoparticles is almost one-tenth of the pure EB. The dielectric value becomes constant in the frequency region greater than 400 kHz. The change in dielectric behaviour of the composite is explained on the basis of multilayered interface formed between the ZnO nanoparticles and emeraldine chains. Nanoparticles have high energy surface which is responsible for the decrease of free volume for the orientation of polymer chains consequently decrease in dielectric constant of the composite. TEM images shows about 10 nm ZnO particles embedded in the emeraldine matrix. From the XRD data it has been observed that the lattice parameters of ZnO have been modified due to the alignment of polymer chains along the basal planes of the nanoparticles. The shift of N=Q=N and N–B–N vibration bands to higher wave number in IR indicates that interaction between emeraldine chain and nanoparticles which provides stability to emeraldine matrix.

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Metadata
Title
Dielectric behaviour of emeraldine base polymer–ZnO nanocomposite film in the low to medium frequency
Authors
M. L. Singla
Rajeev Sehrawat
Nidhi Rana
Kulvir Singh
Publication date
01-05-2011
Publisher
Springer Netherlands
Published in
Journal of Nanoparticle Research / Issue 5/2011
Print ISSN: 1388-0764
Electronic ISSN: 1572-896X
DOI
https://doi.org/10.1007/s11051-010-9968-4

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