Fig. 2 | Nature Communications

Fig. 2

From: Spatially heterogeneous dynamics in a metallic glass forming liquid imaged by electron correlation microscopy

Fig. 2

Spatial maps of structural relaxation time on the nanowire in the supercooled liquid regime. a T = 523 K, b T = 519 K, c T = 515 K, d T = 511 K, e T = 507 K. The maps show domains with varying relaxation time at the nanometer scale. With decreasing temperature, slow domains appear larger and occupy a greater fraction of the map, especially very close to Tg = 507 K. There is a region ~1 nm thick with ~20 times shorter relaxation time near the surface of every wire. f The mean structural relaxation time for the nanowire interior (bulk) and the near-surface layer. The error bars are the standard deviation of the mean of four measurements on different nanowires. Fitting to the Arrhenius form yields activation energies of 3.7 ± 0.3 eV for the bulk and 1.7 ± 0.3 eV for the near-surface

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