Flexible nanostructure electronic devices

• US 7,956,525 B2
• Filed: 05/14/2004
• Issued: 06/07/2011
• Est. Priority Date: 05/16/2003
• Status: Active Grant

• Current Assignee: Nanomix Incorporated (CJY Holdings Ltd.), Regents of the University of California (University of California)
• Original Assignee: Nanomix Incorporated (CJY Holdings Ltd.), Regents of the University of California (University of California)
• Inventors: Armitage, N. Peter, Bradley, Keith, Gabriel, Jean-Christophe P., Gruner, George
• Primary Examiner(s): Williams, Joseph L
• Assistant Examiner(s): QUARTERMAN, KEVIN J
• Application Number:
  US10/846,072
• Publication Number:
  US 20050184641A1
• Time in Patent Office: 2,580 Days
• Field of Search: 313309-311
• US Class Current: 313/309
• CPC Class Codes: B82Y 10/00 Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
• CPC Class Codes: B82Y 15/00 Nanotechnology for interacting, sensing or actuating, e.g. quantum dots as markers in protein assays or molecular motors
• CPC Class Codes: H01B 1/24 the conductive material comprising carbon-silicon compounds, carbon or silicon
• CPC Class Codes: H10K 10/701 Organic molecular electronic devices
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: H10K 85/221 Carbon nanotubes

Abstract

A flexible electronic device is made up of nanostructures. Specifically, the device includes a flexible substrate, a film of nanostructures in contact with the flexible substrate, a first conducting element in contact with the film of nanostructures, and a second conducting element in contact with the film of nanostructures. The nanostructures may comprise nanotubes, such as carbon nanotubes disposed along the flexible substrate, such as an organic or polymer substrate. The first and second conductive elements may serve as electrical terminals, or as a source and drain. In addition, the electronic device may include a gate electrode that is in proximity to the nanotubes and not in electrical contact with the nanotubes. In this configuration, the device can operate as a transistor or a FET. The device may also be operated in a resistive mode as a chemical sensor (e.g., for sensing NH₃).

Claims

1. An electronic device, comprising:

a flexible substrate;

a film of nanostructures supported by the flexible substrate;

a first conducting element in contact with the film of nanostructures;

a second conducting element in contact with the film of nanostructures wherein the film of nanostructures has essentially semiconducting properties; and

a gate electrode in proximity to the film of nanostructures and not in electrical contact with the film of nanostructures;

wherein the flexible substrate is selected from the group consisting of organic molecules, polymers and porous polymers and the gate electrode comprises a conductive nanostructure network.

2. The device of claim 1, wherein the electronic device is selected from the group consisting of transistors, chemical sensors, biological sensors, light sensors, pressure sensors, logic elements, and circuits.

3. The device of claim 1, wherein the flexible substrate is transparent to electromagnetic radiation in at least one range of wavelengths.

4. The device of claim 1, wherein the film of nanostructures comprises at least one nanostructure selected from the group consisting of nanotubes, nanospheres, nanocages, nanococoons, nanofibers, nanowires, nanoropes and nanorods.

5. The device of claim 1, wherein the film of nanostructures is uniform.

6. The device of claim 1, wherein the film of nanostructures comprises an essentially two-dimensional, monolayer network of nanotubes.

7. The device of claim 1, having only a single conducting path through the film of nanostructures between the first conducting element and the second conducting element.

8. The device of claim 1, wherein the film of nanostructures is on a surface of the substrate.

9. The device of claim 1, wherein the film of nanostructures is within the substrate.

10. The device of claim 1, wherein the first conducting element and the second conducting element are metal electrodes.

11. The device of claim 10, wherein the metal electrodes comprise at least one metal selected from the group consisting of transition metals and aluminum.

12. The device of claim 1, wherein the first conducting element and the second conducting element comprise conductive nanostructure networks.

13. The device of claim 1, wherein the flexible substrate comprises an organic substrate.

14. The device of claim 1, wherein the flexible substrate comprises a polymer substrate and the film of nanostructures comprises a film of carbon nanotubes.

15. The device of claim 14, further comprising functionalization materials on the film of carbon nanotubes.

16. The device of claim 15, wherein the electronic device is a sensor device.

17. The device of claim 1, wherein the first conducting element and the second conducting element comprise conductive nanostructure networks.

18. An electronic device, comprising:

a flexible substrate;

a film of nanostructures supported by the flexible substrate;

a first conducting element in contact with the film of nanostructures; and

a second conducting element in contact with the film of nanostructures wherein the film of nanostructures has essentially semiconducting properties;

wherein the flexible substrate is selected from the group consisting of organic molecules, polymers and porous polymers and wherein the film of nanostructures comprises a three-dimensional, multiple-layer mat of nanostructures.

19. An electronic device, comprising:

a flexible substrate;

a film of nanostructures supported by the flexible substrate;

a first conducting element in contact with the film of nanostructures; and

a second conducting element in contact with the film of nanostructures wherein the film of nanostructures has essentially semiconducting properties;

wherein the first conducting element and the second conducting element comprise conductive nanostructure networks.