Poly(2-ethylaniline)(P2EANI) films were chemically deposited onto gold electrodes using ammonium persulfate as oxidant in the presence of the surfactants sodium dodecyl sulfate (SDS, anionic), tetradecyltrimethylammonium bromide(TTAB, cationic) and polyoxyethylene octyl phenyl ether(Triton-X 100, non-ionic). The doping and adsorption effects of surfactants onto the properties of P2EANI, were correlated with mass gain, and were determined in situ during polymerization of 2EANI using quartz crystal microbalance (QCM). The frequency shift of P2EANI in the presence of Triton-X 100 was very sharp and fast. TTAB exhibited the lowest frequency and mass shift among the three surfactants. P2EANIs were characterized using FTIR and UV-visible spectroscopies, TGA, conductivity measurements and SEM analysis. The latter technique showed that the polymer morphology is, as expected, affected by the incorporation of surfactants into the polymer.