Electrochemical Characterization of Charge Injection at Electrodeposited Platinum Electrodes in Phosphate Buffered Saline

Abstract

Platinum exhibits biocompatibility and chemical stability over a wide potential range and hence is a candidate material for implantable electrodes. Electrodeposition is of interest for the fabrication of implantable electrodes since it is compatible with a wide range of patterning techniques, including conventional microfabrication, soft-lithography, and electrochemical template synthesis. We show that surface roughness of platinum electrodes deposited from ammonium hexachloroplatinate solution is dependent on the deposition potential. We demonstrate that diameter electrodeposited platinum microelectrodes can inject of charge in a biphasic pulse with a potential window as small as .