Fig. 4: Growth trends for two pits displaying secondary growth regimes.

Plots of pit volume as a function of time elapsed after nucleation are provided for two pits that exhibited piecewise sigmoidal growth kinetics in (a, b). Dashed lines separate the initial and secondary growth regimes. 3D renderings of the pit shown in (a) at the six timesteps highlighted red are provided in (c–h). The droplet and wire surface are colored gray. Yellow indicates new growth relative to the previous time step while black represents growth at the prior time step. The arrow at (d) highlights the beginning of droplet spreading. (i–k) show 2D slices of this pit at 8 timesteps. (i) shows a top-down view of the droplet above the pit while (j) and (k) show cross-sections of the pit along the axes shown in (i). Arrows indicate droplet spreading at 3.9 and 6.5 h. after this pit nucleated and oxide jacking at 18.2 and 24.7 h. after this pit nucleated. Representative error bars indicate absolute error in pit volume measurement.