We propose to determine the structures (polymer and solvent populations and spatial distributions) of polyaniline films deposited by different protocols. These involve different electrochemical control functions (potentiostatic; potentiodynamic; galvanostatic) and different dopant anions. The aims are to determine the extent of structural variation and, more significantly, its persistence when the film is subject to extended redox cycling. The latter is a test of whether it is polymerization conditions or immediate environment that determine film structure. The outcomes of these experiments will provide a rationale for widely acknowledged differences in the performance of nominally "identical" films prepared by different workers; this is a substantive barrier to practical applications.