Method for making carbon nanotubes
AssigneeGeneral Motors Corporation
InventorCharles Howard Olk
Life of this patent
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Abstract
Carbon nanotubes are produced by submerging carbonaceous anode and cathode electrodes in liquid nitrogen or other suitable liquefied materials such as helium or hydrogen, and passing a direct current between the electrodes to strike a plasma arc between the anode and cathode that erodes carbon from the anode and deposits carbon nanotubes on the surface of the cathode.
Claims4
A method of making carbon nanotubes comprising immersing at least two carbonaceous electrodes in a liquefied gas and placing said electrodes in closely spaced-apart opposing positions with one electrode adapted to serve as a cathode and the other electrode as an anode in a DC electrical circuit and striking an electrical arc between the electrodes to produce and deposit carbon nanotubes on the cathode.
Dependencies are inferred from the claim text.