Apparatus, method, and computer program product providing edgeless carbon nanotube resonator arrays
View Patent ↗A nanotube apparatus is described. The apparatus includes a first electrode having a first edge. An array of nanotubes distributed in a closed path are also included. The closed path surrounds the first electrode and adjacent to the first edge. The closed path is also locally straight. Each of the nanotubes has an end that is free to oscillate. The apparatus also includes a second electrode having a second edge surrounding both the first electrode and the array of nanotubes. Methods are also described.
1. An apparatus comprising:
a first electrode having a first edge;
an array of nanotubes distributed in a closed path, where the closed path surrounds the first electrode and adjacent to the first edge, the closed path is locally straight, and where each of the nanotubes comprises an end that is free to oscillate; and
a second electrode having a second edge surrounding both the first electrode and the array of nanotubes.
2. The apparatus of claim 1 , wherein the first electrode is a gate and the second electrode is a drain.
3. The apparatus of claim 1 , wherein the first electrode is a drain and the second electrode is a gate.
4. The apparatus of claim 1 , wherein the closed path is circular, the first edge is circular and the second edge is circular.
5. The apparatus of claim 1 , wherein the apparatus is a tunable radio frequency filter.
6. The apparatus of claim 1 , further comprising a source electrode, wherein the array of nanotubes is electrically connected to the source electrode.
7. The apparatus of claim 1 , where a bias current applied to the nanotubes alters a resonant frequency of the nanotubes.
8. A method comprising:
providing a substrate;
forming a first electrode having a first edge on the substrate;
disposing an array of nanotubes in a closed path on the substrate where the closed path is adjacent to the first edge and surrounds the first electrode, and where an end of each of the nanotubes is free to move.
9. The method of claim 8 , further comprising disposing a second electrode having a second edge on the substrate, wherein the second edge is adjacent to the array of nanotubes.
10. The method of claim 8 , wherein the closed path is circular.
11. The method of claim 8 , wherein disposing the array of nanotubes comprises growing the nanotubes on the substrate using chemical vapor deposition.
12. The method of claim 8 , controlled at least in part as a result of execution of computer program instructions stored in a computer readable memory medium.
13. A method comprising:
providing a resonator structure comprising:
a first electrode,
an array of nanotubes arranged in a closed path, where the closed path is adjacent to a first edge of the first electrode and surrounding the first electrode, and
a second electrode adjacent to the array of nanotubes and surrounding both the first electrode and the array of nanotubes;
where each of the nanotubes comprises an end that is free to oscillate at a resonant frequency;
applying a bias current to the array of nanotubes to establish a resonant frequency of the array of nanotubes;
applying a signal to one of the first electrode and the second electrode; and
receiving a current between the array of nanotubes and the second electrode based on the signal applied to the first electrode.
14. The method of claim 13 , further comprising adjusting the bias current to the array of nanotubes.
15. The method of claim 13 , controlled at least in part as a result of execution of computer program instructions stored in a computer readable memory medium.
16. An apparatus comprising:
resonator means for providing:
a first electrode,
an array of nanotubes arranged in a closed path, where the closed path is adjacent to a first edge of the first electrode and surrounding the first electrode, and
a second electrode adjacent to the array of nanotubes and surrounding both the first electrode and the array of nanotubes;
where each of the nanotubes comprises an end that is free to oscillate at a resonant frequency;
means for applying a bias current to the array of nanotubes to establish a resonant frequency of the array of nanotubes;
means for applying a signal to one of the first electrode and the second electrode; and
means for receiving a current that is conducted between the array of nanotubes and the second electrode based on the signal applied to the first electrode.
17. The apparatus of claim 16 , where the resonator means is a radio frequency filter.