A radio one ten-thousandth of the diameter of a human hair is now picking up local radio stations.
at the University of California, Berkeley, have built a radio out of a
single carbon nanotube, which is 100 billion times smaller than the
first commercial radios. The nanotube radio requires only a battery and
earphones to tune in to a station.
nanoradio is currently configured as a receiver but could also work as
a transmitter. Scientists say it could be used in any number of
applications — from cell phones to microscopic devices that sense the
environment and relay information via radio signals.
are rolled-up sheets of interlocked carbon atoms that form incredibly
strong tubes. They detect radio signals by vibrating thousands to
millions of times per second in tune with the radio wave. Reception on
the nanoradios is scratchy, but scientists say they're working on
improving the quality.
Click the above link to listen to clips.