Thin films of parent polyaniline (PANi) were produced using the self-assembly (SA) technique, by immersing substrates into solutions of PANi in dimethylformamide and acetonitrile. The adsorbed polymer is undoped which means that the driving force for adsorption was probably H-bonding. Polymer adsorption depends on the polymer solution concentration, immersion time and washing procedures.
Pontes, R. S., Dhanabalan, A., Camilo, C. S., Ferreira, M., & Oliveira, O. N. (1999). Preparation of parent polyaniline thin films using the self-assembly technique. Synthetic Metals, 101(1), 726. https://doi.org/10.1016/S0379-6779(98)01221-1