A nano radio is a carbon nanotube anchored to an electrode, with a second electrode just beyond its free end. When a voltage is applied between the electrodes, electrons flow from a battery through the nanotube, jumping off its tip to the positive electrode. A radio wave alternately attracts and repels the nanotube tip, causing it to vibrate in sync. When the tip is farther from the electrode, fewer electrons bridge the gap; the varying electrical signal recovers the audio signal encoded by the radio wave.
Credit: John Hersey
Nanoradio Seminar Report
The seminar report discusses the construction of a fully functional, fully integrated radio receiver from a single carbon nanotube. The nanotube serves simultaneously as all essential components of a radio: antenna, tunable band-pass filter, amplifier, and demodulator. A direct current voltage source, as supplied by a battery, powers the radio. Using carrier waves in the commercially relevant 40−400MHz range and both frequency and amplitude modulation techniques, the seminar report demonstrates successful music and voice reception.
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