Abstract
Poly(3,4-ethylenedioxythiophene) (PEDOT) is widely used in organic electronics and biomedical device coatings because of its outstanding electrical properties and chemical stability. In our previous research, X-ray photoelectron spectroscopy (XPS) was used to investigate the incorporation of various counterions into electrochemically polymerized PEDOT. In this research, XPS was used to further investigate the chemical composition of electrochemically polymerized PEDOT films to determine whether anionic hydration determined counterion affinity in a more systematic way. These counterions probed in this research included sodium citrate tribasic dIhydrate (Na3C6H5O7 2H2O), potassium citrate tribasic monohydrate (K3C6H5O7 H2O), sodium carbonate (Na2CO3), calcium carbonate (CaCO3), sodium thiosulfate (Na2S2O3), sodium acetate trihydrate (NaC2H3O2 3H2O), sodium phosphate dibasic hepthydrate (Na2HPO4 7H2O), sodium phosphate monohydrate (NaH2PO4 H2O), sodium chloride (NaCl), sodium bromide (NaBr), lithium bromide ...
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