Morphological Characterization and Analytical Application of Poly(3,4-ethylenedioxythiophene)-prussian Blue Composite Films Electrodeposited in Situ on Platinum Electrode Chips

Electrochemical in situ preparation and morphological characterization of inorganic redox material-organic conducting polymer coatings as thin films on platinum electrodes are presented. Composite inorganic-organic coatings consist of Prussian blue (PB) and [poly(3,4-ethylenedioxythiophene)] (PEDOT), and PEDOT organic polymers doped with ferricyanide (PEDOT-FeCN). The PEDOT coating deposited from an aqueous solution containing the EDOT monomer and LiClO4 as supporting electrolyte was used as a “reference” material (PEDOT-ClO4). The composite coatings were prepared by electrochemical methods on platinum electrode chips, which consist of a 150 nm Pt layer deposited on 100-oriented standard 3’’ silicon wafers. Electrochemical behavior of the composite inorganic-organic coatings is based mainly on inorganic component redox reactions. Different surface properties of the composite materials were studied. Thus, the roughness of the deposited films was measured by both atomic force microscopy (AFM) and profilometry, leading to roughness values ranging from 3 nm to ∗ Corresponding author. Phone: +40 21 4023886; fax: +40 21 3111796 , E-mail address: [email protected] ha l-0 06 32 30 5, v er si on 1 14 O ct 2 01 1 Author manuscript, published in "Thin Solid Films 519, 22 (2011) 7754-7762" DOI : 10.1016/j.tsf.2011.06011