Capacitor Electrode Stimulates Nerve or Muscle without Oxidation-Reduction Reactions

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Science  06 Jul 1973:
Vol. 181, Issue 4094, pp. 74-76
DOI: 10.1126/science.181.4094.74


Porous tantalum disks, available as "slugs" from the capacitor industry, have large available surface area and a thin insulating coating of tantalum pentoxide. When implanted, they fill with extracellular fluid and operate as capacitor-stimulating electrodes having high capacitance per unit volume. Capable of stimulating excitable tissute without generating electrochemical by-products, these electrodes should provide a safer interface between neural prosthetic devices and human tissue.