156986.fig.003a
(a)
156986.fig.003b
(b)
156986.fig.003c
(c)
156986.fig.003d
(d)
156986.fig.003e
(e)
156986.fig.003f
(f)
Figure 3: Cross-sectional images and length of Si NWs etched for different time. (a) 30 s; (b) 60 s; (c) 90 s; (d) 120 s; (e) 150 s; (f) length of the Si NWs ( 𝐿 ) versus etching time ( 𝑡 ) curve.