CHARACTERIZATION AND ELECTROCHROMIC PROPERTIES OF ULTRATHIN FILMS SELF-ASSEMBLED FROM POLY(DIALLYLDIMETHYLAMMONIUM) CHLORIDE AND SODIUM DECATUNGSTATE

Poly(diallyldimethylammonium) chloride (P) and sodium decatungstate (W ) were layer-by-layer self-assembled onto quartz, mica, and ITO-electr ode substrates (S). The self-assembled films, S-(P/W)(n), were charact erized by absorption spectrophotometry, reflectivity, cyclic voltammet ry and scanning force microscopy(AFM). The electrochemical properties of the S-(P/W)(n) films were found to differ from those in which the p olyelectrolyte remained at the outermost layer, i.e., S-(P/W)(n)/P. Ph otoelectrochemical measurements provided evidence for the electrochrom ic and photoelectrochromic behavior of these films.