Deletable nanotube circuit

1. A method of constructing a circuit, comprising:

providing an array of carbon nanotubes (CNTs) comprising a plurality of segments, at least a subset of the segments intersecting to form electrically responsive junctions; and

selectively inactivating at least one segment or junction by at least one of (a) applying electromagnetic energy by at least one of (i) directing laser energy toward the at least one segment or junction or (ii) directing an electron beam toward the at least one segment or junction, or (b) chemically attacking the at least one segment or junction.

2. The method of claim 1 , wherein selectively inactivating at least one segment or junction by at least one of (a) applying electromagnetic energy by at least one of (i) directing laser energy toward the at least one segment or junction or (ii) directing an electron beam toward the at least one segment or junction, or (b) chemically attacking the at least one segment or junction includes:

directing laser energy toward the at least one segment or junction.

3. The method of claim 1 , wherein applying electromagnetic energy selectively inactivating at least one segment or junction by at least one of (a) applying electromagnetic energy by at least one of (i) directing laser energy toward the at least one segment or junction or (ii) directing an electron beam toward the at least one segment or junction, or (b) chemically attacking the at least one segment or junction includes:

directing an electron beam toward the at least one segment or junction.

4. The method of claim 1 , wherein selectively inactivating at least one segment or junction by at least one of (a) applying electromagnetic energy by at least one of (i) directing laser energy toward the at least one segment or junction or (ii) directing an electron beam toward the at least one segment or junction, or (b) chemically attacking the at least one segment or junction includes:

chemically attacking the at least one segment or junction.

5. The method of claim 4 , wherein chemically attacking the at least one segment or junction includes applying an activatable composition to the at least one segment or junction, and selectively activating the activatable composition.

6. The method of claim 5 , wherein the activatable composition is photosensitive, and wherein selectively activating the activatable composition includes applying electromagnetic energy to the activatable composition.

7. A method of constructing a circuit, comprising:

providing an array of carbon nanotubes (CNTs) comprising a plurality of segments, at least a subset of the segments intersecting to form electrically responsive junctions; and

selectively inactivating at least one segment or junction by applying a voltage to one or more of the segments, wherein the application of voltage to one or more segments includes applying voltage between a plurality of segments, and wherein the applying a voltage between a plurality of segments comprises applying timed pulses to one or more of selected segments in the subset of segments intersecting to form junctions.

8. The method of claim 7 , wherein applying timed pulses to one or more of selected segments in the subset of segments intersecting includes timing the pulses to temporally overlap at a selected common center.

9. The method of claim 8 , wherein the selected common center is the at least one segment or junction to be inactivated.

10. The method of claim 1 , wherein the CNTs are arranged in a rectilinear array.

11. The method of claim 1 , wherein the CNTs are arranged in a hexagonal pattern.

12. The method of claim 1 , wherein the CNTs are arranged in a three-dimensional pattern.

13. The method of claim 1 , wherein the CNTs include at least one junction connecting at least three segments.

14. The method of claim 1 , wherein the CNTs include at least one junction connecting exactly three segments.

15. The method of claim 1 , wherein providing the array of CNTs comprises growing the CNTs along selected paths.

16. The method of claim 1 , wherein the CNTs comprise at least one semiconducting CNT.

17. The method of claim 1 , wherein the CNTs comprise at least one metallic CNT.

18. The method of claim 1 , further comprising measuring an electrical property of at least segment or one junction.

19. A method of constructing a circuit, comprising:

providing an array of carbon nanotubes (CNTs) comprising a plurality of segments, at least a subset of the segments intersecting to form electrically responsive junctions;

measuring an electrical property of at least segment or one junction;

selecting at least one segment or junction in response to the measured electrical property; and

selectively inactivating the at least one segment or junction.