Fig. 2: Study of Ag electrodeposit on the octahedral Au nanocrystals surface.
From: Observing atomic layer electrodeposition on single nanocrystals surface by dark field spectroscopy
SEM images of a large and b (top) small scale along with b (bottom) structural schematic of Au nanooctahedrons to show their highly ordered geometry on the electrode surface and the structural details. c A cyclic voltammogram (CV) of Ag underpotential deposition (UPD) on a Au nanooctahedrons-coated glassy carbon electrode in the electrolyte of 1 mM Ag2SO4 and 0.05 M H2SO4. d The potential-dependent scattering spectra of a single Au nanooctahedron. The inset is the zoom-in spectra showing the details of spectral variation. e The optical “CV” of a single Au nanooctahedron reconstructed using the peak position of the scattering spectra as a function of the applied potential. f The time-dependent peak position change of the scattering spectra of a single Au nanooctahedron under different potential controls (from 0.500 to 0.400 V with a step of 50 mV and from 0.400 to 0.360 V with a step of 10 mV). g CVs for the Ag deposition on a Au (111) electrode before (black curve) and after (red curve) the adsorption of the surfactant, CTAB. h The peak potential statistics of UPD peaks obtained from the optical “CV”s of 20 individual Au nanooctahedrons. The scale bars are 200 nm in a and 50 nm in b.
