Electrochemical polymerization of pyrrole on Au(111) in sulphuric acid and sodium hexafluoroaluminate solutions monitored by electrochemical scanning tunneling microscopy
The electropolymerization of pyrrole on Au(111) electrode was traced by EC-STM in two different electrolytes. The evolution from 2D isolated nano-islands to finally overlapping 3D globules was observed. The Au(111) substrate plays only a role of a support without any influence on the polymer adsorbate order. The role of the OH- chemisorption in the formation of the PPy overlayer is discussed.