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(A) Schematic illustration of electrosynthesis setup. PPy was deposited onto gold coated silicon wafers using a constant potential, for each of the four counter ions. (B) Chemical structure of PPy. A− represents the counter ion incorporated in the polymer to maintain charge neutrality. (C) Chemical structures showing the four different counter ions incorporated in the polymerization of PPy: DBS, TsO, ClO4 and Cl.
