Improving Seeding Growth Method for Preparing Densely Attached Spherical Gold Nanoparticles on Solid Substrate

In this paper, a modified seed-mediated growth approach to produce gold nanoparticles through HAuCl4 chemical reduction in water fabricated by growth process on indium tin oxide (ITO) was proposed. Particular attention was devoted to exploring the seeding and growth number cycle process in the formation of Au nanoparticles on the ITO surface. In agreement with the assumed analytical model, we have found that the absorbance maximum intensity lambda(max) depends substantially on the metal nanoparticles' sizes, shape and density on the ITO surface. The deposited nanoparticles' synthesized parameters were evaluated by the surface images obtained using field emission scanning electron microscopy (FE-SEM), UV-Vis spectroscopy and electrochemical measurements. The results show that the electrochemical responses of the as-prepared sample were significantly improved, in particular for the 2-cycle seeded particles followed by one-cycle growth.

Automated summary

A modified seed-mediated growth approach was proposed to produce gold nanoparticles on ITO surface through HAuCl4 chemical reduction in water. The study focused on seeding and growth number cycle process in forming Au nanoparticles on ITO surface. Results indicate that the absorbance intensity lambda(max) is substantially dependent on the sizes, shape, and density of metal nanoparticles on ITO surface. Characterization was done using FE-SEM, UV-Vis spectroscopy, and electrochemical measurements.