Fig. 2. (a) Scattering spectra and Lorentz fit of an AuNP randomly selected during the electrochemical growth of the CdS shell. (b) Simulation results of scattering spectra response of Au@CdS with different shell thicknesses. (c) Dark-field images of a single particle during the electrochemical growth of the shell. (d) SEM images of 40 nm AuNP modified on ITO which undergoes different deposition times. (a): 0 min, (b): 3 min, (c): 6 min, (d): 9 min (scale bar: 20 nm).
