Issue 48, 2014

Preparation and enhanced electro-responsive characteristic of graphene/layered double-hydroxide composite dielectric nanoplates

Abstract

To combine the advantages of a conducting graphene nanosheet (GNS) and insulating layered inorganic, we used a simple one-pot hydrothermal method to prepare two-dimensional dielectric nanoplates composed of a GNS/Mg–Al layered double-hydroxide (GNS/LDH) composite for use as a novel anisotropic electro-responsive electrorheological (ER) material. The structures of the samples were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, and scanning electron microscopy. The conductivity and dielectric properties were measured by an impedance analyzer, and the electro-responsive ER characteristic of the GNS/LDH composite dispersed in insulating oil was characterized by a rheometer. The results demonstrate that the LDH can provide an electrically insulating effect for GNS, while the incorporation of the conducting GNS can enhance the dielectric polarization of LDH. The GNS/LDH composite shows a significantly stronger ER effect compared to the pure LDH, especially under AC electric fields due to the enhanced polarization response.

Graphical abstract: Preparation and enhanced electro-responsive characteristic of graphene/layered double-hydroxide composite dielectric nanoplates

Article information

Article type
Paper
Submitted
17 Sep 2014
Accepted
21 Oct 2014
First published
21 Oct 2014

J. Mater. Chem. C, 2014,2, 10386-10394

Author version available

Preparation and enhanced electro-responsive characteristic of graphene/layered double-hydroxide composite dielectric nanoplates

Y. Dong, Y. Liu, J. Yin and X. Zhao, J. Mater. Chem. C, 2014, 2, 10386 DOI: 10.1039/C4TC02085E

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