A polymer modified sonochemically fabricated glucose oxidase microelectrode
array with microelectrode population densities of up to 2.5 x 105
microelectrodes cm-2 is reported. These microelectrode sensors were formed by
first depositing an insulating film on commercial screen printed electrodes
which was subsequently sonicated to form cavities of regular sizes in the film.
Electropolymerisation of aniline at the microelectrode cavities formed
polyaniline protrusions containing entrapped glucose oxidase. Chemical
deposition of polysiloxane from dichlorodimethysilane was used to deposit a thin
protective and diffusion mass transport controlling coating over the electrodes.
The physical and electrochemical properties of these films were studied. The
performance of the final glucose oxidase based microelectrode sensor array is
reported