Metallic nickel (Ni) was successfully dispersed onto a polyaniline (PANI) matrix by a simple onestep electrochemical method. Ni particles as deposited onto the polymer seemed to be much smaller compared to those deposited onto bare Pt. The size of the Ni deposits was found to be influenced by the electrolytic bath composition and potential sweep rate. The PANI matrix thus dispersed with Ni particles exhibited ferromagnetic behavior and a lower electrical conductance. The decrease in conductivity may be attributed to the partial blockage of the conductive path by the Ni particles thus embedded in the polymer matrix. @ 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103:321-327, 2007