Figure 2.

SEM images of flower-like nanotips formed at a repetition rate of 8.4 MHz and dwell times of (a) 2 ms, (b) 5 ms, and (c) 10 ms. Inset shows high magnification image of a typical single 10 ms dwell time nanotip with a head width of 20 nm.

Samarasekera et al. Nanoscale Research Letters 2012 7:404   doi:10.1186/1556-276X-7-404
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