Figure 2.

Time-lapse micrographs showing the appearance of unknown water through spinodal-like dynamics at the interface between water and ice V grown by compression. (A) Time-lapse micrographs captured by the in-situ observations, where the micrograph at 0 s shows the initial state before compression and the images collected at 0.10–1.73 s are time-lapse micrographs after compression. The applied pressure was retained during acquisition of the micrographs at 0.10–1.73 s in (A). (B) Magnified images of the region indicated by the white dashed squares denoted by a–e. (C) Schematics showing the time evolution of the morphology of the unknown water. The magenta and cyan solid lines indicate the corresponding schematic for the time evolution of the morphology shown in micrographs (B) 0.10–1.73 s underlined with magenta and cyan solid lines. The yellow and gray arrows in the right-hand bottom corner show the operations of compression and retention, respectively. See also SI Video S1.