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US 4,836,904 AGranted
Graphite electrode with modified surface
AssigneeMedisense, Inc.
InventorsFrazer A. Armstrong, Brian N. Oliver, Hugh A. O. Hill
Life of this patent
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Abstract
An electrode has a graphite surface at least part of which is an edge-plane graphite surface to which Cr(III) complexes are attached by surface C--O groups. The graphite can be polished pyrolytic graphite. The complex coverage can be 5-20%. The complex may comprise proteins, enzyme substrates, specific binding agents, intermediate metabolites or the like, e.g. the protein plastocyanin, so that direct unmediated electrochemistry is possible at the electrode.
Claims8
An electrode for use in bioelectrochemistry, said electrode comprising:
- (a) a graphite surface, at least part of which is a planar surface at right angles to the direction of easy graphite cleavage;
- and
- (b) complexes comprising Cr (III), said Cr (III) being attached to said electrode surface by covalent bonds to carbon-oxygen groups, and being capable of attachment by covalent bonds to a ligand that is biochemically active.
Dependencies are inferred from the claim text.