Silicon nanoparticles(SiNPs) have been prepared by DC arc-discharge plasma,which were pretreated by 4-aminobenzoic acid(ABA) and further in situ coated by the conductive polyaniline(PANi) on its surface,thus the core/shell type polyaniline-silicon nanoparticles(PANi-SiNPs) composite was fabricated.Analysis results by means of Fourier transform infrared spectroscopy(FTIR),differential scanning calorimetry(DSC),transmission electron microscopy(TEM) and X-ray diffraction(XRD) indicate that ABA and SiNPs are co...