| The template electrode of Au-SHSAM modified by dithiol which with 8 carbon alkyl chain length was self-assembled, and then little size nanoparticles of Au, Ag, Pd, Pt which protected by the weak protective agent, tetraoctyl bromide (TOAB), were anchored on the electrode surface to obtain stable nanoparticles modified electrode by ligand exchange method, due to the strong interaction between the dithiol group on the electrode and nanoparticles (M-S) ,The electrode modified by dithiol would replace weak protective agent (TOAB) which on nanoparticles surface. The electrochemical behavior in H2SO4 solution and the morphology of nanoparticles on dithiol template electrode surface was characterized by cyclic voltammetry(CV) and scanning tunneling microscopy (STM). Then we found that the coverage of nanoparticles on the electrode surface could be controlled by adjusting soak time in nanoparticles collosol. The approach is original, simple, and has certain universal. |
