Room temperature liquid metal, for example Gallium-based alloy, has high electrical and thermal conductivity, and excellent fluidity. They can be used in various application fields such as flexible electronics, wearable devices, biomedical practices, exoskeleton systems and soft robotics etc. However, components made by liquid metal may heavier than non-metal ones. The density of metal is larger than non-mental materials like polymer, plastics and wood.
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Source: Phys.org