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Nano Radio

M

MadDrummer

AM or FM. Thinner than a human hair.

Physicists at UC Berkeley say they have produced the world's smallest radio out of a single carbon nanotube that is 10,000 times thinner than a human hair.
Professor Alex Zettl led a team that developed the minuscule filament, which can be tuned to receive AM or FM transmissions.
The first song it played?......

http://www.sfgate.com/cgi-bin/article.cgi?file=/c/a/2007/11/01/BUTBT44A2.DTL&type=business

Damn! Did I just lose my radio in the sink?!
 
Admittedly this is a first effort. If I were debugging a radio with physical parts, I'd say it has multiple problems.
It sounds like insufficient Q at the frequency demodulated.. The detection noise sounds like rectification of an AM signal
where the developed AVC voltage is encountering a leaky electrolytic capacitor.
I am impressed that it can be done, but sure am glad I won't have to live with radios based on this.
As each new generation of electronics offers less access , this seems to be a way to eliminate electronics altogether.
But the same processes occur in the nanotube, and should be able to be analyzed as electrical responses.

I'd like to hear what this sounds like with a real tuned RF section ahead, a mixer, and then use the nanotube as a IF amp and detector.


I'm disappointed they did not offer more info on what frequency this test ran at.
 
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