Figure 3

SEM surface image of a typical device. (a) The SEM surface image of a typical device; scale bar, 1 μm. (b) Regional enlargement image of the CdS/TNTs; scale bar, 100 nm.
SEM surface image of a typical device. (a) The SEM surface image of a typical device; scale bar, 1 μm. (b) Regional enlargement image of the CdS/TNTs; scale bar, 100 nm.