Nanotube device and method of fabrication
First Claim
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1. A method of depositing nanotubes, comprising:
- (a) defining a region on a structure by an aperture;
(b) configuring the aperture to control a number of nanotubes to be deposited by electrophoresis in the region; and
(c) depositing the number of nanotubes in the region by electrophoresis;
wherein the aperture is configured as a slot having a width of less than about 100 nm, and a length sufficiently large to allow deposition of at least two nanotubes along a direction of the length.
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Abstract
A nanotube device and a method of depositing nanotubes for device fabrication are disclosed. The method relates to electrophoretic deposition of nanotubes, and allows a control of the number of deposited nanotubes and positioning within a defined region.
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Citations
20 Claims
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1. A method of depositing nanotubes, comprising:
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(a) defining a region on a structure by an aperture; (b) configuring the aperture to control a number of nanotubes to be deposited by electrophoresis in the region; and (c) depositing the number of nanotubes in the region by electrophoresis; wherein the aperture is configured as a slot having a width of less than about 100 nm, and a length sufficiently large to allow deposition of at least two nanotubes along a direction of the length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15)
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14. A method of depositing nanotubes, comprising:
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(a) defining a region on a structure by an aperture, which step of defining includes providing the structure with an insulating layer over a metal layer; and
forming the aperture through the insulating layer to define the region at the metal layer;(b) configuring the aperture to control a number of nanotubes to be deposited by electrophoresis in the region; (c) depositing the number of nanotubes in the region by electrophoresis, which step of depositing includes exposing the structure to an electrolytic fluid containing nanotubes;
providing a metal electrode in the electrolytic fluid; and
providing a positive bias to the metal electrode relative to the metal layer;
applying a bias voltage to the metal layer; and
depositing the number of nanotubes in a vertical orientation to contact the metal layer inside the aperture; and(d) controlling orientations of the nanotubes inside the aperture by adjusting an orientation of the metal electrode relative to the metal layer. - View Dependent Claims (17, 18, 19, 20)
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16. A method of forming a carbon nanotube-based device, comprising:
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providing a substrate with an insulating layer formed on a conductive layer; forming an aperture through the insulating layer to expose a region of the conductive layer; immersing the substrate in an electrolytic fluid containing carbon nanotubes; providing a metal electrode in the electrolytic fluid; applying a bias voltage across the conductive layer and the metal electrode; and depositing at least one carbon nanotube in a substantially perpendicular orientation with respect to the region, wherein one end of the carbon nanotube contacts the region proximate a center of the region; providing the substrate with the at least one deposited carbon nanotube to a plasma process system for further processing; and re-aligning the at least one deposited carbon nanotube to a desired orientation by applying an electric field between the conductive layer and an electrode in the plasma process system.
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Specification