Figure 7
Schematic of the reagent and by-product diffusion paths and diagram of the Au/Si Schottky contact. (a) Schematic of two possible diffusion paths of the reagent and by-product during the metal-assisted chemical etching process. (b) Energy band diagram of the Au/Si Schottky contact; ΦB is the barrier height for the electronic holes injected from the Au into the Si.