Carbon micro-sensor electrode and method for preparing it

• US 5,376,251 A
• Filed: 11/04/1993
• Issued: 12/27/1994
• Est. Priority Date: 07/09/1991
• Status: Expired due to Term

• Current Assignee: Agency for Industrial Science and Technology, Mitsubishi Pencil Kabushiki Kaisha
• Original Assignee: Agency for Industrial Science and Technology, Mitsubishi Pencil Kabushiki Kaisha
• Inventors: Suda, Yoshihisa, Yamada, Masahiro, Negishi, Akira, Kaneko, Hiroko, Kawakubo, Takamasa
• Primary Examiner(s): Niebling, John
• Assistant Examiner(s): Bell, Bruce F.
• Application Number:
  US08/147,780
• Time in Patent Office: 418 Days
• Field of Search: 204/294, 204/291, 204/403, 204/416, 204/415, 435/817
• US Class Current: 204/403.1
• CPC Class Codes: C12Q 1/001 Enzyme electrodes
• CPC Class Codes: Y10S 435/817 Enzyme or microbe electrode

Abstract

A carbon micro-sensor electrode is disclosed which is prepared by impregnating, adsorbing or chemically modifying a pure composite carbon wire having many micropores extending to its surface and interior with a reactant such as an enzyme, a metal complex compound, an organic compound or a metabolite; and a method for preparing this carbon micro-sensor electrode is also disclosed.

The above-mentioned electrode can be used for a long period of time, since the reactant is received in the many micropores. Furthermore, after used, the electrode may be cut off to expose a new electrode surface, and this new electrode surface may be coated with a material which does not impede an electrode reaction, whereby the reactant can be prevented from flowing out. Thus, the carbon micro-sensor electrode of the present invention can be repeatedly utilized.

Claims

1. A carbon micro-sensor electrode comprising a composite carbon single wire having many micropores extending to its surface and interior;

and a reactant retained in said micropores, which comprises at least one reactant selected from the group consisting of an enzyme, a metal complex compound, an organic compound and a metabolite.

2. The carbon micro-sensor electrode according to claim 1, further comprising an insulating coating layer, for preventing the reactant from flowing out, on the surface of the carbon wire.

3. The carbon micro-sensor electrode according to claim 2, further comprising the insulating material is at least one selected from the group consisting of a silicon resin, a polyimide resin, a methacrylic resin, and a monomer, an oligomer and an initial polymer thereof.