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Fabrication of polystyrene-embedded electrodes. A) A palladium decoupler and a detection electrode are affixed to connecting wires and are placed in a vertical position into an aluminum dish. B) Commercially available polystyrene powder is poured around electrodes. C) The polystyrene is heated to 250 °C for several hours. D) Side-view of a polystyrene-embedded electrode base that has been removed from the mold and shaped by wet polishing.
