Patent ID: 7521275

Claim:
A method for forming a free-standing electrostatically-doped carbon nanotube device, comprising: providing a carbon nanotube on a substrate, said carbon nanotube having a first end, a second end, and a free-standing portion therebetween; disposing a first metal contact on the substrate directly adjacent to and electrically coupled to the first end of the carbon nanotube; disposing a second metal contact on the substrate directly adjacent to and electrically coupled to the second end of the carbon nanotube; disposing a first metal electrode within the substrate adjacent to and at a distance from the first end of the carbon nanotube, wherein the first metal electrode is capacitively coupled to the first end of the carbon nanotube; disposing a second metal electrode within the substrate adjacent to and at a distance from the second end of the carbon nanotube, wherein the second metal electrode is capacitively coupled to the second end of the carbon nanotube; selectively applying a first bias to the first metal electrode to electrostatically dope the first end of the carbon nanotube; and selectively applying a second bias to the second metal electrode to electrostatically dope the second end of the carbon nanotube.