Figure 3
(a), (b) SEM micrographs of NW3 before and after exposure for 1 h, respectively. (c) Normalized low-temperature hyperspectral CL line scan along the NW growth axis after exposure (color-coded on a logarithmic intensity scale) for NW3. (d), (e) SEM micrographs of NW4 before and after exposure for 3 h, respectively. Colored arrows indicate the positions at which EDX measurements were carried out. (f) Normalized low-temperature hyperspectral CL line scan after exposure for NW4. The scale bar in (a) corresponds to 1 µm and applies to all SEM images. |