Superplastic Formation of Metal Nanostructure Arrays with Ultrafine Gaps

1970099 (9 of 9) Figure 2. a-d) Nanodimers with various diameter/gap ratios (2:1, 3:1, 6:1, 12:1) before (a,c) and after (b,d) laser shock. The initial nanoparticle radii are 160 and 300 nm for (a) and (c), respectively. The insets show the treated nanodimer arrays, showing the good uniformity of the process. The laser fluence is 17 kJ m -2 . Scale bar: 1 m (insets: 2 m). e,f) Influence of laser energy fluence on nanodimer gap shrinking: initial radius 400 nm (e); initial radius 160 nm (f). Scale bars: 1 m (e) and 500 nm (f).