A simple synthesis protocol for stable aqueous colloidal solutions of poly(4-styrenesulfonate) templated polyaniline is developed. The electrical conductivity and submicro/nano features observed in their spin-coated films are shown to be correlated to the polyelectrolyte template molecular weight. This demonstrates the utility of the latter as a new design element for conducting polymer films. (C) 2003 Elsevier Ltd. All rights reserved.