Carbon micro-sensor electrode and method for preparing it
First Claim
1. A method for preparing a carbon microsensor electrode which comprises the steps of extruding, into a wire form having a desired diameter, a composition prepared by highly dispersing and mixing a crystalline carbon fine powder with an organic binder;
- calcining the wire up to a high temperature in an inert atmosphere or a non-oxidizing atmosphere to carbonize the contained organic binder and to thereby form the pure composite carbon wire having many micropores extending to its surface and interior; and
then subjecting the carbon wire having many micropores to impregnation, adsorption, chemical modification or a combination thereof with a reactant which comprises at least one reactant selected from the group consisting of an enzyme, a metal complex compound, a reactant organic compound and a metabolite.
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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.
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4 Claims
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1. A method for preparing a carbon microsensor electrode which comprises the steps of extruding, into a wire form having a desired diameter, a composition prepared by highly dispersing and mixing a crystalline carbon fine powder with an organic binder;
- calcining the wire up to a high temperature in an inert atmosphere or a non-oxidizing atmosphere to carbonize the contained organic binder and to thereby form the pure composite carbon wire having many micropores extending to its surface and interior; and
then subjecting the carbon wire having many micropores to impregnation, adsorption, chemical modification or a combination thereof with a reactant which comprises at least one reactant selected from the group consisting of an enzyme, a metal complex compound, a reactant organic compound and a metabolite. - View Dependent Claims (2, 3, 4)
- calcining the wire up to a high temperature in an inert atmosphere or a non-oxidizing atmosphere to carbonize the contained organic binder and to thereby form the pure composite carbon wire having many micropores extending to its surface and interior; and
Specification