The electrical characteristics of nylon-6 nanofibers incorporated with TiO 2 and Fe 3O 4 nanoparticles were investigated. The resultant nanofibers exhibited good incorporation of nanoparticles. The impregnated TiO 2 and Fe 3O 4 nanoparticles into the nylon-6 nanofibers were confirmed by high resolution transmission electron microscopy (HR-TEM) and energy dispersive X-ray (EDX) spectroscopy studies. The electrical conductivity of the nylon-6 incorporated with TiO 2 and Fe 3O 4 composite nanofibers were higher than that of the pristine nylon-6 nanofibers. The impregnation of TiO 2 and Fe 3O 4 nanoparticles significantly enhanced the electrical property of the composite nanofibers. These polymeric/nanoparticles composite nanofibers structure may open a new direction for future organic electronics. © 2012 Elsevier Ltd. All rights reserved.