Figure 7.

Nanotip 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.

Patel et al. Nanoscale Research Letters 2013 8:185   doi:10.1186/1556-276X-8-185
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