Figure 6

Temperature effect on the evolution of self-assembled Au droplets on GaAs (100). Au droplets were fabricated by annealing between 250°C and 550°C for 450 s with 2.5-nm Au deposition. The evolution process is presented with (a-h) the AFM top-view images of 1 × 1 μm² and the line profiles in (a-1) to (h-1) with the corresponding FFT power spectra in (a-2) to (h-2). AFM top-view images of 3 × 3 μm² are shown in (e-3) to (h-3), and the insets of AFM side-view images of 1 × 1 μm² are shown in (e-4) to (h-4).