Graphene's high-speed seesaw

The new transistor developed by Nottingham and Manchester researchers
30 Apr 2013 16:00:00.000
A new transistor capable of revolutionising technologies for medical imaging and security screening has been developed by graphene researchers from the Universities of Nottingham and Manchester.

Writing in the journal Nature Communications, the researchers report the first graphene-based transistor with bistable characteristics, which means that the device can spontaneously switch between two electronic states. Such devices are in great demand as emitters of electromagnetic waves in the high-frequency range between radar and infra-red, relevant for applications such as security systems and medical imaging.

Bistability is a common phenomenon — a seesaw-like system has two equivalent states and small perturbations can trigger spontaneous switching between them. The way in which charge-carrying electrons in graphene transistors move makes this switching incredibly fast — trillions of switches per second.
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More information is available from Laurence Eaves on +44 (0)115 951 5136, laurence.eaves@nottingham.ac.uk
 

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