Kumar, Ramesh and Dhawan, S. K. and Singh, H. K. and Kaur, Amarjeet (2016) Charge transport mechanism of thermally reduced graphene oxide and their fabrication for high performance shield against electromagnetic pollution. Materials Chemistry and Physics, 180. pp. 413-421. ISSN 0254-0584

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Abstract

Shielding devices from thermally reduced graphene oxide have been fabricated for superior electromagnetic interference (EMI) shielding effectiveness. The prepared pristine samples of graphene oxide were reduced at different temperatures. The samples of the thermally reduced graphene oxide were tested in the frequency range of 12.4-18 GHz (Ku band) and the maximum value of EMI shielding efficiency was found to be 80.81 dB for the sample reduced at 1073 K. The charge transport mechanism of thermally reduced graphene oxide samples was also investigated in the temperature range of 10-300 K. The increase in electromagnetic shielding efficiency of thermally reduced graphene oxide samples is attributed to increase in the conductivity and the number of graphitic domains in it. The increase in number of graphitic domains is quantitatively explained on the basis of Tuinstra and Koenig relation. The results show great potential of thermally reduced graphene oxide as a new type of microwave absorbing material.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier B.V.
Uncontrolled Keywords:	Graphene oxide EMI shielding Variable range hopping DC conductivity
Subjects:	Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Dr. Rajpal Walke
Date Deposited:	16 Nov 2017 07:45
Last Modified:	16 Nov 2017 07:45
URI:	http://npl.csircentral.net/id/eprint/2161

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