Abstract: Core-shell structured nanoparticles of conducting polymers have outstanding physical and chemical property and broad application in many domains, such as energy, photoelectron and conducting dope. PANI-coated poly(styrene-co-styrene sulfonate) (PANI/PS-PSS) nanoparticles were prepared. First, nanoparticles of poly(styrene-co-styrene sulfonate)（PS-PSS）were synthesized in a nitrogen atmosphere by a microemulsion system, then the PS-PSS particles were used as templates to prepare PAIN-coated core-shell PANI/PS-PSS nanoparticles under a low temperature.

Key words: core-shell structure , polyaniline/poly(styrene-co-styrene sulfonate) nanoparticles, microemulsion