Aniline as a stabilizer for metal nanoparticles

Palladium nanoparticles were synthesized by two different methods, i.e. reflux and γ-radiolysis in the presence of various monomers like aniline, N-ethyl aniline, N-methyl aniline, o-anisidine and o-toluidine as the stabilizing agent for the Pd nanoparticles. UV–Visible spectral analysis reveals that the aniline renders best stability to the Pd nanoparticles up to a period of 96 h. Nanocomposites were synthesized by polymerizing aniline stabilized Pd° nanoparticle solution by using ammonium persulphate as an oxidizing agent. The average particle size of the nanoparticles calculated from X-ray diffraction patterns were ∼24 nm (reflux method) and ∼28 nm (γ-irradiation method). The above results are supported by TEM analysis.