New study reveals communications potential of graphene

February 19, 2014
Grafene consists of a single layer of carbon atoms. Credit: Wikimedia Commons

Providing secure wireless connections and improving the efficiency of communication devices could be another application for graphene, as demonstrated by scientists at Queen Mary University of London and the Cambridge Graphene Centre.

Often touted as a wonder material, is a one-atom thick layer of carbon with remarkable, record breaking properties. Until now its ability to absorb electromagnetic radiation – energy from across the – was not known.

Publishing in the journal Scientific Reports, the scientists demonstrated that the increased the absorption of by 90 per cent at a wide bandwidth.

"The technological potential of graphene is well-known. This paper demonstrates one example of how that potential can translate into a practical application," said Yang Hao, co-author of the study and Professor of Antennas and Electromagnetics at Queen Mary's School of Electronic Engineering and Computer Science.

"The transparent material could be added as a coating to car windows or buildings to stop radio waves from travelling through the structure. This, in turn, could be used to improve secure wireless network environments, for example."

The researchers placed a stack of layers of graphene supported by a metal plate and the mineral quartz to absorb the signals from a millimetre wave source, which allows the efficient control of wave propagation in complex environments.

Co-author Bian Wu, who is at Queen Mary from Xidian University in China on a scholarship from China Scholarship Council, added: "The stacking configuration gives us better control of the interaction between and the graphene."

The group is now developing prototypes like wireless networks, which are aimed to take the graphene from lab-based research to engineering applications.

Explore further: Engineers make world's smallest FM radio transmitter

More information: 'Experimental demonstration of a transparent graphene millimetre wave absorber with 28% fractional bandwidth at 140 GHz' will be published in the journal Scientific Reports on Wednesday 19 February.

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not rated yet Feb 22, 2014
What doesn't graphene do?
Feb 22, 2014
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