Poly(3,4-ethylenedioxythiophene) (PEDOT) films were synthesized electrochemically by direct anodic oxidation of 3,4-ethylenedioxythiophene (EDOT) in aqueous solution containing the environmentally-friendly amino acid-based surfactant sodium N-lauroylsarcosinate (SLS), which as a mild biosurfactant has good biocompatibility, low toxicity, good solubilization, and efficient and quick biodegradability. The moderate interactions between a neutral SLS-aqueous micellar solution and EDOT monomer led to the decreased onset oxidation potential of EDOT. PEDOT films were characterized spectroscopically using Fourier transform infrared and ultraviolet-visible techniques. PEDOT films with good thermal stability and electrical conductivity of 5 S cm(-1) were synthesized in neutral SLS-water micellar solutions. (C) 2009 Elsevier B.V. All rights reserved.