Nanostructured Working Electrode of an Electrochemical Sensor, Method of Manufacturing Thereof and Sensor Containing This Working Electrode

• US 20080169191A1
• Filed: 05/05/2006
• Published: 07/17/2008
• Est. Priority Date: 05/09/2005
• Status: Active Grant

• Current Assignee: BVT Technologies, A.S., Prirodovedecka Fakulta Univerzita Jana Evangelisty Purkyne
• Original Assignee: BVT Technologies, A.S., Prirodovedecka Fakulta Univerzita Jana Evangelisty Purkyne
• Inventors: Krejci, Jan, Stejskalova, Radka, Maly, Jan
• Granted Patent: US 7,811,431 B2
• Time in Patent Office: Days
• US Class Current: 204/403.01
• 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: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: G01N 27/3278 involving nanosized elements, e.g. nanogaps or nanoparticles nanopores G01N33/48721; magnetic beads G01N27/745
• CPC Class Codes: G01N 33/5438 Electrodes

Abstract

A nanostructured working electrode of an electrochemical sensor wherein the working electrode is composed of a material in the form of a film and is inserted onto the sensor. The electrode can be prepared from materials the use of which was impossible in the working electrodes known in the art (e.g. metals of defined purity). A method of manufacturing of the nanostructured working electrode and an electrochemical sensor containing the nanostructured electrode is disclosed

Claims

1. A nanostructured working electrode of an electrochemical sensor, characterized in that the active surface of the electrode is composed of a material in the form of a film of the thickness of 0.1-100 μ

m, inserted into the place of the working electrode of the sensor.

2. The nanostructured working electrode of the electrochemical sensor according to claim 1, characterized in that the film is prepared from an element selected from the group containing metals of the groups IA, IIA, IIIA, IVA, VA, IIIB, IVB, VB,VIB, VIIB, VIIIB, IB and IIB of the periodic table, lanthanoids and semi-metal and non-metallic elements of the groups IIIA and IVA of the periodic table.

3. The nanostructured working electrode of the electrochemical sensor according to claim 1, characterized in that the film is prepared from an alloy of at least two metals selected from the group containing metals of the groups IA, IIA, IIIA, IVA, VA, IIIB, IVB, VB, VIB, VIIB, VIIIB, IB and HB of the periodic table.

4. The nanostructured working electrode of the electrochemical sensor according to claim 1, characterized in that the film is prepared from a magnetic alloy having high permeability.

5. The nanostructured working electrode of the electrochemical sensor according to claim 1, characterized in that the film is prepared from a high-temperature superconductor.

6. The nanostructured working electrode of the electrochemical sensor according to claim 1, characterized in that further structures are applied or immobilized on the film.

7. A method of manufacturing of the nanostructured working electrode of the electrochemical sensor according to claim 1, characterized in that planar shapes are prepared from the material in the form of a film having the thickness of 0.1-100 μ

m, the planar shapes being by 1-1000 μ

m larger than the desired area of the active surface of the working electrode, a carrier paste is applied onto the place of the working electrode on the pad, onto said carrier paste the planar shape is inserted with a micromanipulator, the electrode is then hardened and, subsequently, a part of the surface of the working electrode is overprinted with a dielectric paste and hardened again

8. The method of manufacturing of the nanostructructured working electrode of the electrochemical sensor according to claim 7, characterized in that the carrier paste does not contain volatiles.

9. The method of manufacturing of the nanostructructured working electrode of the electrochemical sensor according to claim 7, characterized in that during the first hardening step, the working electrode is fixed to the pad by sintering the paste containing the particles of gold and/or platinum and/or silver at the temperature 350- 1000°

C.

10. The method of manufacturing of the nanostructructured working electrode of the electrochemical sensor according to claim 7, characterized in that an undercut is carved into the pad in such manner that the electrode prepared from a thicker film is in one level with the pad.

11. An electrochemical sensor, characterized in that it contains the nanostructured working electrode according to claim 1.