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article imageBerkeley Team Builds World’s Smallest FM Radio

By Chris V. Thangham     Nov 1, 2007 in Technology
Researchers from the University of California, Berkeley have created the world’s smallest FM radio, made of a carbon nanotube. The radio measures one ten thousandth the diameter of a single human hair and can be used for cellphones to microscopic device
Physicists from Berkleymade this FM radio out of a single carbon nanotube unit. The device works as an antenna, tuner, amplifier and demodulator in the same unit. The standard FM radio has separate components.
The initial experimental unit is used as an FM receiver but can also be used as an FM transmitter. It's used in a wide variety of applications such as in cellphones to microscopic devices that sense the environment and transmit information via radio signals.
This nanotube is less than a micron long and only ten nanometers wide in dimensions, or 10,000 times thinner than the width of a single human hair.
Nanotube FM Radio.
When a radio wave of a specific frequency impinges on the nanotube it begins to vibrate vigorously. An electric field applied to the nanotube forces electrons to be emitted from its tip. This electrical current may be used to detect the mechanical vibrations of the nanotube, and thus listen to the radio waves.
One of the scientists said nanotube technology can lead to new applications such as radio-controlled devices small enough to be in a human’s bloodstream.
Since this is in the preliminary stages, they still have a few hurdles to clear before they are used commercially.
In my opinion, there is no excuse for the mobile phone and portable handhelds to say they can’t include FM radio anymore.
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