Brain implantable electrodes having an increased signal to noise ratio and method for making same

Herein disclosed are an electrode and a method for making an electrode having an enhanced electrically effective surface providing an increased signal to noise ratio. The electrode having a metal surface selected from gold, tungsten, stainless steel, platinum, platinum-tungsten, platinum-iridium, and combinations thereof; and an electrically conductive coating on said metal surface, said coating consisting essentially of polymerized pyrrole.