METHOD FOR DIRECT IMMOBILIZATION OF BIOFUNCTIONAL MATERIAL AND ELECTRODE USING SAID METHOD

PURPOSE:To obtain a biosensor electrode which has high sensitivity and exhibits fast response by electrodepositing enzyme, etc., on a microelectrode, then electrolytically depositing a conductive material in the form of fine particles on said electrode. CONSTITUTION:A biofunctional material 5 is directly electrodeposited on the conductive material, for example, platinum or the like and a metal salt is simultaneously electrolytically reduced (electrodeposited) to deposit the conductive, for example, fine metallic particle material, together with the biofunctional material, thereon. More specifically, the biofunction material is taken into the pores of the fine conductive material particles 4 while said fine particles are formed on the platinum microelectrode 7, by which the titled electrode is prepd. The size of the pores and the quantity of the immobilized biofunctional material can be controlled by adjusting current density, electrodeposition time, etc. The function of the immobilized biofunctional material electrode obtd. in such a manner can be maintained for a long period of time, has the high sensitivity and can exhibit the quick response.