Extended Data Fig. 2: Water drops contacting STA brought to high temperatures.
From: Inhibiting the Leidenfrost effect above 1,000 °C for sustained thermal cooling
a. Side view of water contacting STA at T = 500 °C. As water (dyed in red) contacts a STA, it immediately impregnates the membrane, without penetrating the U-shaped channels. The liquid is kept within the membrane by capillarity and by the vapour pressure inside the channels. The scale bar is 0.5 mm. b. Top views of water drops (approximately 17 µL) on STA at T = 800 °C and T = 1150 °C (around 1200 °C, the membrane starts to melt). Drops behave as reported in Fig. 1c (T = 1000 °C). Images framed in red show the formation of non-uniform and isolated bubbles, that break within several milliseconds owing to an intense boiling. The lifetimes of the drop are 0.35 s and 0.28 s, respectively, showing the persistence of wicking even at ultra-high temperature. Scale bars show 2 mm.
