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Two-terminal nanotube devices and systems and methods of making same

  • US 7,781,862 B2
  • Filed: 11/15/2005
  • Issued: 08/24/2010
  • Est. Priority Date: 05/09/2005
  • Status: Active Grant
First Claim
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1. A two terminal switching device, comprising:

  • a first conductive terminal;

    a second conductive terminal in spaced relation to the first conductive terminal;

    a nanotube article having a plurality of nanotubes, said nanotube article being arranged such that the nanotube article is in permanent and direct physical contact with both the first and second conductive terminals; and

    stimulus circuitry in electrical communication with at least one of the first and second conductive terminals,said stimulus circuitry configured to create a first voltage difference between the first conductive terminal and the second conductive terminal, to induce a change in the resistance of the nanotube article between the first and second conductive terminals from a relatively low resistance to a relatively high resistance,said stimulus circuitry configured to create a second voltage difference between the first conductive terminal and the second conductive terminal, to induce a change in the resistance of the nanotube article between the first and second conductive terminals from a relatively high resistance to a relatively low resistance,wherein the relatively high resistance of the nanotube article between the first and second conductive terminals corresponds to a first state of the two terminal switching device, and wherein the relatively low resistance of the nanotube article between the first and second conductive terminals corresponds to a second state of the two terminal switching device,wherein the first and second states of the two terminal switching device are nonvolatile.

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