30 Jun '16, 8pm

Resonating Drums Made Out of Graphene Could Lead to Better Sensors

Resonating Drums Made Out of Graphene Could Lead to Better Sensors

Researchers at Cornell University have fabricated graphene membranes into micrometer-scale drums that can be stimulated by a voltage to transfer one type of mechanical vibration into another . The researchers believe this capability can lead to new applications in telecommunications where graphene-based mechanical resonators could be used as frequency mixers, which are often used, for example, to modulate carrier waves with signals. In research described in the journal Nature Nanotechnology , the researchers found that graphene could produce three different frequencies of vibration in circular drums made of graphene. Each frequency, or mode, of vibration was coupled to the other and could exchange energy. “We’ve shown that there is an effect that will convert energy from one mechanical mode to another mechanical mode,” said Roberto De Alba, a graduate student who led the r...

Full article: http://spectrum.ieee.org/nanoclast/semiconductors/materia...

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