Issue 40, 2012

Graphene/polyaniline nanorod arrays: synthesis and excellent electromagnetic absorption properties

Abstract

In the paper, we find that graphene has a strong dielectric loss, but exhibits very weak attenuation properties to electromagnetic waves due to its high conductivity. As polyaniline nanorods are perpendicularly grown on the surface of graphene by an in situ polymerization process, the electromagnetic absorption properties of the nanocomposite are significantly enhanced. The maximum reflection loss reaches −45.1 dB with a thickness of the absorber of only 2.5 mm. Theoretical simulation in terms of the Cole–Cole dispersion law shows that the Debye relaxation processes in graphene/polyaniline nanorod arrays are improved compared to polyaniline nanorods. The enhanced electromagnetic absorption properties are attributed to the unique structural characteristics and the charge transfer between graphene and polyaniline nanorods. Our results demonstrate that the deposition of other dielectric nanostructures on the surface of graphene sheets is an efficient way to fabricate lightweight materials for strong electromagnetic wave absorbents.

Graphical abstract: Graphene/polyaniline nanorod arrays: synthesis and excellent electromagnetic absorption properties

Supplementary files

Article information

Article type
Paper
Submitted
02 Jul 2012
Accepted
31 Aug 2012
First published
31 Aug 2012

J. Mater. Chem., 2012,22, 21679-21685

Graphene/polyaniline nanorod arrays: synthesis and excellent electromagnetic absorption properties

H. Yu, T. Wang, B. Wen, M. Lu, Z. Xu, C. Zhu, Y. Chen, X. Xue, C. Sun and M. Cao, J. Mater. Chem., 2012, 22, 21679 DOI: 10.1039/C2JM34273A

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