Fig. 2. Synthesis of LM-polymer composites. (a) Left: microscopic images of EGaIn micro/nanodroplets with diameter of O(10 μm), O(1 μm), and O(100 nm). The far left image presents the top view of a composite with an elastomer matrix and O(10 μm) droplets made by shear mixing bulk EGaIn with elastomer. Center: schematic shows the preparation of LM-nanocomposites. Right: image of stretched LM–elastomer nanocomposite (silver; annular shape) on a silicone elastomer carrier film (semitransparent). Reproduced with permission,¹² copyright 2019, Wiley-VCH. (b) LM-nanocomposites prepared by surface-initiated atom transfer radical polymerization. Reproduced with permission,⁴¹ copyright 2019, Nature Publishing Group. (c) Schematic illustration of atom transfer radical polymerization (ATRP) and materials made by this technique. (d) Schematic illustration of the synthesis of “litchi”- and “passion fruit”-like EGaIn@ZIF-8 NPs. Pre-synthesized EGaIn@PVP nanodroplets are mixed with 2-methylimidazole (2-MI) and Zn²⁺ at different L/M ratios (N = 2 and 1). Reproduced with permission,⁴⁹ copyright 2020, Royal Society of Chemistry.