Electrophoretic/electrochemical devices with nanometer-scale metallic components

• US 20040069638A1
• Filed: 09/30/2002
• Published: 04/15/2004
• Est. Priority Date: 09/30/2002
• Status: Abandoned Application

• Current Assignee: Regents of the University of California (University of California)
• Original Assignee: Regents of the University of California (University of California)
• Inventors: Lane, Stephen M., Barbee, Troy W. Jr., Wilson, William D., Surh, Michael P.
• Application Number:
  US10/262,510
• Publication Number:
  US 20040069638A1
• Time in Patent Office: Days
• US Class Current: 204/600
• CPC Class Codes: G01N 27/4473 by electric means
• CPC Class Codes: G01N 27/48 using polarography, i.e. measuring changes in current under a slowly-varying voltage

Abstract

Electrophoric/electrochemical devices involving two separate, parallel, flat surfaces consisting of metal/insulator nano-laminates. The use of two nano-laminates increases the electrophoretic flow through a channel of given dimensions at a given applied voltage as compared to prior approaches. The introduction of these separate electrodes to the walls of the fluid channel maximizes the amount of exposed metal and minimizes the diffusion distance to facilitate electrochemical redox reactions. The combination of rapid solvent turnover and efficient detection of low concentrations of analyte creates a fast and sensitive detector.

Claims

1. In a sensor, the improvement comprising:

a nano-laminate component,

said nano-laminate component including a plurality of separated exposed cross-sections.

2. The improvement of claim 1, wherein said pair of separated exposed cross-sections are located in separate nano-laminate structures,

said structures being interconnected by an insulating material.

3. The improvement of claim 2, wherein said nano-laminate structures are separated by a distance d, and wherein said distance d defines a width of a fluid channel.

4. The improvement of claim 3, wherein said distance d is less than a height of said structures.

5. The improvement of claim 3, wherein said distance d is equal to or greater than a height of said structures.

6. The improvement of claim 2, wherein said structures comprise metal/insulator nano-laminates.

7. The improvement of claim 6, wherein said metal/insulator nano-laminates comprise combinations of layers of metal selected from the group consisting of Al, Au, and Mo, or any other metal from which nano-laminate structures may be formed;

and layers of insulator material selected from the group consisting of Al₂O₃, SiO₂, and CeO₂, or any other insulator from which nanolaminates may be formed.

8. The improvement of claim 6, wherein said metal/insulator nano-laminate comprises pairs of metal/insulator layers in the range of two to millions of pairs.

9. The improvement of claim 1, wherein said plurality of separated exposed cross-sections are formed on a pair of nano-laminated metal/insulator structures.

10. The improvement of claim 9, wherein said structures a secured together in a spaced relation by insulating adhesive material.

11. The improvement of claim 10, wherein said structures are separated by a distance in the range of μ

m to millimeters.

12. The improvement of claim 11, wherein the distance is less than, equal to, or greater than a height of said structures.

13. In an electrophoretic/electrochemical device, the improvement comprising:

at least one nanometer-scale component,

said component including two separate, parallel, flat surfaces consisting of metal/insulator nano-laminates.

14. The improvement of claim 13, wherein said nano-laminates are secured in fixed separated relation by insulating adhesive material so as to define a fluid flow channel therebetween.

15. The improvement of claim 14, wherein said nano-laminates have walls which simultaneously function as electrodes in an electrochemical circuit.

16. The improvement of claim 14, wherein said insulating adhesive material defines in conjunction with wall surfaces of said nano-laminates four walls of a fluid channel.

17. The improvement of claim 13, wherein said nano-laminates are separated by a distance selected from the group consisting of less than a height of said nano-laminates and greater than the height of said nano-laminates.