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Rutherford Backscattering Studies of Polypyrrole Films: I . Effect of Electrolyte on Deposition Efficiency

1995; Institute of Physics; Volume: 142; Issue: 2 Linguagem: Inglês

10.1149/1.2044020

1945-7111

Jesse S. Wainright, Christian A. Zorman,

Analytical Chemistry and Sensors

The effect of three different electrolytes on the efficiency of polypyrrole deposition was studied using Rutherford backscattering spectrometry (RBS). The RBS results were used to determine the thickness, roughness, and composition of the polypyrrole films. The films were deposited from aqueous solutions of sodium perchlorate, sodium xylene‐sulfonate, and poly(sodium 4‐styrene‐sulfonate) (NaPSS). The highest deposition efficiency (93%) was obtained with the sodium xylene‐sulfonate electrolyte. The NaPSS electrolyte yielded the highest film density and the lowest film roughness. Deposition from electrolytes yielded the lowest efficiency and the roughest films. Evidence for a nucleation and growth mechanism was also observed.