Polyelectrolyte films with Prussian blue nanoparticles and conductive polymers

The authors have investigated the formation and electroactive properties of the multilayer films of poly(allylamine hydrochloride) (PAH) and Prussian blue (PB) nanoparticles. The films were deposited on gold electrode surface using layer-by-layer deposition. Using cyclic voltamperometry, the authors demonstrated that the PAH/PB films exhibited the electroactive properties, increasing with the number of deposited PB layers. They were also electrocatalytically active toward reduction and oxidation of hydrogen peroxide. By introducing the conductive polymers, polypyrrole (PPy) and polyaniline (PANi), into the multilayer films structure, their electroactive properties were enhanced. They were also more sensitive for electrochemical detection of hydrogen peroxide.