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    J Neurosci Methods. 1983 Sep;9(1):15-21.

    A microelectrode for delivery of defined charge densities.

    Abstract

    A procedure is described for fabricating microelectrodes of platinum-30% iridium, insulated with Epoxylite varnish and having beveled ellipsoidal tips obtained by truncating a conical tip at an angle of 30-50 degrees. The geometric surface area of the ellipsoidal facet is reproducible and easily measured. Using these electrodes, neurons in the cerebral cortex of cats have been activated without damage throughout 24 h or more of continuous stimulation at 15-30 microA and charge densities of 150-300 microC/cm2.phase.

    PMID:
    6632958
    [PubMed - indexed for MEDLINE]

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