Figure 2From: Flower-like Na2O nanotip synthesis via femtosecond laser ablation of glassSEM 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.Back to article page