Fig. 2 Reconfiguration of liquid metals into 3D structures.

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Fig. 2 Reconfiguration of liquid metals into 3D structures. Reconfiguration of liquid metals into 3D structures. (A) Schematic illustrations of each step of reconfiguration. (B) Schematic illustration of two adhesion forces during reconfiguration. (C) Photograph of lift-off (left) and cutoff (right) of EGaIn from the substrate. Scale bar, 100 μm. (D) The plot of the state of line versus the nozzle lift-off velocity. (E) Optical micrographs of reconfiguration. The printed horizontal line (left) is lifted off and reconfigured (right). Scale bars, 200 μm. (F) SEM images of reconfigured square coils. The end of the inner line in the square coil (left) is lifted and reconfigured (right). Scale bars, 200 μm. (G) SEM images of 3D bridges of EGaIn. Scale bar, 500 μm. Inset: Magnified SEM image of 3D bridge. Scale bar, 200 μm. (H) Plots of the applied biases and responding current densities in EGaIn. (Photo credit: Young-Geun Park, Yonsei University). Young-Geun Park et al. Sci Adv 2019;5:eaaw2844 Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).