Synthesis and characterization of SiO2/polyaniline/Ag core-shell particles and studies of their electrical and hemolytic properties: multifunctional core-shell particles

Three layers of conducting core-shell nanocomposite particles composed of SiO2/polyaniline (PAni)/Ag were prepared in the presence of silicon dioxide (SiO2) in an aqueous solution containing sodium dodecyl benzenesulfonate (SDBS) as a surfactant. SiO2 nanoparticles were coated by PAni, which results in the formation of core-shell nanocomposites. Silver nanoparticles were synthesized by a citrate reduction method. Ag nanoparticles could be electrostatically attracted onto the surface of SiO2/PAni nanocomposites, leading to the formation of SiO2/PAni/Ag nanocomposites with a core-shell structure. The products were characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), current-voltage (I-V) analysis and cyclic voltammetry (CV). The resultant nanocomposites have good biological properties.