Graphene Nanoradio, Tune in Turn On Drop Out.
Graphene radio is the latest innovation to have emerged from the work of researchers from Universities in Romania, France and Greece .
Following on from the work of a team at Columbia University who announced to the world the first graphene radio in Dec 2011, the researchers from Europe have now presented evidence of RF demodulation by a single sheet of graphene embedded in a coplanar structure that suggests graphene responds well in the frequencies currently used in industrial, medical and scientific devices. Tested in a frequency range of 100Mhz to 25Ghz the graphene monolayer exhibited a response that suggests it could also be used for short range wireless communication such as Bluetooth.
Nanoradio has been a feature of nanotechnology for some time now and has been at the forefront of developments like blood stream controlled drug delivery, implant monitoring and the energy harvesting. Carbon nanotubes were the basis of the first generation of these devices but there shortcomings were plentiful; a lack of robustness, , narrow bandwidths, and narrow bandwidths with weak output currents all contributed to serious noise issues.
Although comparable devices to those made from carbon nanotubes has yet to be constructed from graphene the research by Dragoman et al shows that graphene is a suitable candidate material for such design improvements.
In conclusion, AM modulated radio waves were demodulated at room temperature in the frequency range 0.1-25 GHz by a simple detector device based on a monolayer graphene embedded in a coplanar line. This concept paves the way towards simplified nanodetctors for both digital as well as analog electronics while retaining CMOS compatibility