Fig. 2.

Structural characterization of EM/LM compounds, EMm and EM/LMm. a Optical photographs of EM/LM compounds at various ratios, beginning as EM and transitioning from a solid-like to a liquid-like material as more LM added. b Demonstration of recyclability of EM/LM compounds, automatic separation of two components depends on the density difference in dilute HCl solution. c Cross-sectional SEM images of EMm at the density of 0.034 g cm⁻³. d Cross-sectional SEM images of EM/LMm at the density of 0.126 g cm⁻³. e EDS mapping of cross-sectional EM/LMm and its uniform distribution of Ga and In elements