Electrical signals transmitted at high frequencies lose none of their energy when passed through the 'wonder material' graphene, a study led by Plymouth University has shown. Discovered in 2004, graphene - which measures just an atom in thickness and is around 100 times stronger than steel - has been identified as having a range of potential uses across the engineering and health sectors¹.

 

Now research has shown graphene out-performs any other known material, including superconductors, when carrying high-frequency electrical signals compared to direct current, essentially² transmitting signals without any additional energy loss.

 

And since graphene lacks band-gap, which allows electrical signals to be switched on and off using silicon³ in digital electronics, academics say it seems most applicable for applications ranging from next generation high-speed transistors⁴ and amplifiers for mobile phones and satellite communications to ultra-sensitive biological sensors⁵.

 

The study was led by Dr Shakil Awan, a Lecturer in the School of Computing⁶, Electronics and Mathematics at Plymouth University, alongside colleagues from Cambridge and Tohoku (Japan) Universities and Nokia Technologies (Cambridge, UK).

 

Dr Shakil Awan, Lecturer in the School of Computing, Electronics and Mathematics and the principal investigator⁷ in the study, said: "An accurate understanding of the electromagnetic properties of graphene over a broad range of frequencies (from direct current to over 10 GHz) has been an important quest for several groups around the world. Initial measurements gave conflicting results with theory because graphene's intrinsic properties are often masked by much larger interfering⁸ signals from the supporting substrate, metallic⁹ contacts and measurement probes. Our results for the first time not only confirm the theoretical properties of graphene but also open up many new applications of the material in high-speed electronics and bio-sensing."

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