Corresponding Author

Shi-gang SUN(sgsun@xmu.edu.cn)


Adsorption of cetyltrimethylammonium bromide (CTAB) on Au(111) electrode was investigated by cyclic voltammetry (CV). The results demonstrate that the adsorption of CTAB on Au(111) yields particular CV features. Both the adsorption of CTA+ and the phase change of the surfactant film are surface structure selective. Two pairs of stable sharp peaks that depend on halide species appear upon the adsorption of cationic surfactant on Au(111) electrode. The relationship between the peak current density and the scan rate indicates that the electron transfer reaction was controlled by diffusion process. These CV features are observed for the first time, and reflect the specific interaction between CTAB and Au(111). The results are of significance in understanding the interaction of CTAB with Au surface for shape-control synthesis of Au nanoparticles.

Graphical Abstract


cetyltrimethylammonium bromide, Au(111) electrode, cyclic voltammetry

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