Polypyrrole nanoparticles with high dispersion stability via chemical oxidative polymerization in presence of an anionic-non-ionic bifunctional polymeric surfactant

► Bifunctional polymeric surfactant was used for the polypyrrole (PPy) nanoparticles. ► The sizes of the PPy nanoparticles were controlled by the amount of the surfactant. ► The PPy nanoparticles exhibited the excellent water-dispersion stability.