Conducting inks

• US 20040262582A1
• Filed: 06/30/2003
• Published: 12/30/2004
• Est. Priority Date: 06/30/2003
• Status: Active Grant

• Current Assignee: Board of Trustees of The University of Illinois
• Original Assignee: Board of Trustees of The University of Illinois
• Inventors: Schricker, April Dawn, Kirkor, Ewa Stanislawa, Scheeline, Alexander
• Granted Patent: US 7,097,788 B2
• Time in Patent Office: Days
• US Class Current: 252/500
• 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 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C09D 11/30 Inkjet printing inks
• CPC Class Codes: C09D 11/52 Electrically conductive inks
• CPC Class Codes: C12Q 1/004 mediator-assisted
• CPC Class Codes: H05K 1/095 for polymer thick films, i.e. having a permanent organic polymeric binder
• CPC Class Codes: H05K 2201/0281 Conductive fibers
• CPC Class Codes: H05K 2201/0323 Carbon
• CPC Class Codes: H05K 2201/0329 Intrinsically conductive polymer [ICP]; Semiconductive polymer
• CPC Class Codes: H05K 2203/0271 Mechanical force other than pressure, e.g. shearing or pulling
• CPC Class Codes: H05K 2203/105 Using an electrical field; Special methods of applying an electric potential
• CPC Class Codes: H05K 3/12 using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns

Abstract

A method of increasing conductivity of an ink, comprises orienting particles in the ink. The ink comprises the particles and solvent, and the particles are conductive anisotropic particles.

Claims

1. A method of increasing conductivity of an ink, comprising:

orienting particles in the ink;

wherein the ink comprises the particles and solvent, and

the particles are conductive anisotropic particles.

2. The method of claim 1, wherein the ink further comprises a binder.

3. The method of claim 1, wherein the particles comprise elemental carbon.

4. The method of claim 1, wherein the particles are selected from the group consisting of graphite, carbon fibers and nanotubes.

5. The method of claim 1, wherein the particles comprise a metal.

6. The method of claim 1, wherein the particles comprise a conductive polymer.

7. A method of increasing conductivity of an ink, comprising:

stretching a substrate;

wherein the ink comprises conductive anisotropic particles and a solvent, and

the ink is on the substrate.

8. The method of claim 7, wherein the ink further comprises a binder.

9. The method of claim 7, wherein the particles comprise elemental carbon.

10. The method of claim 7, wherein the particles are selected from the group consisting of graphite, carbon fibers and nanotubes.

11. The method of claim 7, wherein the particles comprise a metal.

12. The method of claim 7, wherein the particles comprise a conductive polymer.

13. A method of increasing conductivity of an ink, comprising:

rubbing the ink,

wherein the ink comprises conductive anisotropic particles, and a solvent, and

the ink is on a substrate.

14. The method of claim 13, wherein the ink further comprises a binder.

15. The method of claim 13, wherein the particles comprise elemental carbon.

16. The method of claim 13, wherein the particles are selected from the group consisting of graphite, carbon fibers and nanotubes.

17. The method of claim 13, wherein the particles comprise a metal.

18. The method of claim 13, wherein the particles comprise a conductive polymer.

19. A method of increasing conductivity of an ink, comprising:

applying an electric potential to the ink,

wherein the ink comprises conductive anisotropic particles, and a solvent, and

the ink is on a substrate.

20. The method of claim 19, wherein the ink further comprises a binder.

21. The method of claim 19, wherein the particles comprise elemental carbon.

22. The method of claim 19, wherein the particles are selected from the group consisting of graphite, carbon fibers and nanotubes.

23. The method of claim 19, wherein the particles comprise a metal.

24. The method of claim 19, wherein the particles comprise a conductive polymer.

25. A conductive ink, comprising:

conductive anisotropic particles and a solvent,

wherein the particles orient as the solvent evaporates.

26. The ink of claim 25, wherein the ink further comprises a binder.

27. The ink of claim 25, wherein the particles comprise elemental carbon.

28. The ink of claim 25, wherein the particles are selected from the group consisting of graphite, carbon fibers and nanotubes.

29. The ink of claim 25, wherein the particles comprise a metal.

30. The ink of claim 25, wherein the particles comprise a conductive polymer.

31. An ink for manufacturing electrodes for enzymatic electrochemical sensors, comprising:

an enzyme, conductive anisotropic particles, and a solvent.

32. The ink of claim 31, wherein the ink further comprises a binder.

33. The ink of claim 31, wherein the particles comprise elemental carbon.

34. The ink of claim 31, wherein the particles are selected from the group consisting of graphite, carbon fibers and nanotubes.

35. The ink of claim 31, wherein the particles comprise a metal.

36. The ink of claim 31, wherein the particles comprise a conductive polymer.

37. The ink of claim 31, wherein the ink further comprises a redox mediator.