Figure 7From: Study of nanostructure growth with nanoscale apex induced by femtosecond laser irradiation at megahertz repetition rateNanotip growth under different femtosecond laser irradiation dwell times. SEM images of nanotip growth stages at the 8-MHz repetition rate for dwell times of (a) 0.1, (b) 0.25, and (c) 0.50 ms for 214 fs and 16-W average laser power.Back to article page