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Engineers Build Radio Receiver Out Of Graphene

• technologyreview.com

Here's a simple device. Stretch a sheet of graphene between two electrodes to form a kind of trampoline and then place a third electrode under the trampoline. Finally, send a DC current through the graphene and then add a radio frequency voltage on top to see what happens.

This is exactly the experiment that Yuehang Xu at Columbia University in New York and pals have done. They say the graphene sheet resonates when blasted with a voltage changing at radio frequency signals and that this can be easily measured by monitoring the capacitance between the sheet and the third electrode below the sheet.
 
 

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