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World's smallest radio fits in the palm of the hand...of an ant
Date:11/1/2007

veal the originally encoded music or any other data."

By permanently lengthening or shortening the nanotube, a modification resulting from sending a short-lived larger-than-normal electrical current through the device, the researchers were able to control the frequency of the radio signal that the device could receive.

The researchers believe it would be easy to produce such nanotube radios for receiving signals in the 40-400 megahertz range, a range within which most FM radio broadcasts fall.

The researchers fine tune the nanoradio to a frequency, akin to a channel, by using the electrostatic field between the cathode and anode to tighten or loosen the nanotube, a process the researchers relate to the tightening or loosening of a string on a guitar. According to Zettl, the sensitivity of the nanotube radio can be enhanced by attaching an external antenna or by using an array of nanotubes that maintain the extremely small size.

While the concept of a miniaturized receiver for picking up broadcast music signals has appeal, the technology has the potential to assist in a range of interesting uses.

Adds Bruce Kramer, "The application of a fully functioning radio receiver less than 50 millionths of an inch in length and one millionth of an inch in diameter potentially allows the radio control of almost anything, from a single receiver in a living cell to a vast array embedded in an airplane wing."


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Contact: Josh Chamot
jchamot@nsf.gov
703-292-7730
National Science Foundation  
Source:Eurekalert

Page: 1 2 3

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