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As the body's largest organ, the skin is an integrated multisensory system with self‐healing ability and helps stabilize body temperature. It is herein, inspired by natural skin, a wearable patch made from porous polydimethylsiloxane (PDMS) skeleton, poly(vinyl alcohol) (PVA) hydrogel, and silicon oxide (SiO2) particles, offers a combination of self‐healing properties, along with hybrid radiative and evaporative cooling mechanisms, designed for electromyographic (EMG) signal detection and human‐machine interaction. The patch has both high mid‐infrared (MIR) emittance (96%) and visible to near‐infrared (visNIR) reflectance (80%), coupled with efficient water evaporation from the PVA hydrogel, resulting in a hybrid cooling power of 180 W m−2. It obtains a temperature drop of ≈7.7 °C using this patch under a solar intensity of ≈700 W m−2. Furthermore, the patch demonstrates self‐healing ability with ultrafast recovery of electrical conductivity (1 s) and a self‐healing efficiency (≈71%) of fracture strain. Thus, the wearable patch can detect high‐quality EMG signals and provide cooling effects and self‐healing capabilities that enhance comfortability and durability. These features make the patch an advanced solution for developing next‐generation wearable patches that can meet the rigorous demands of durable body temperature control in various applications. [ABSTRACT FROM AUTHOR]

Unlike conventional microelectromechanical systems (MEMS), machines based on gallium liquid metal alloys rely on Marangoni flows to induce motion without mechanical moving parts. Despite this advantage, currently developed liquid metal enabled robotic systems still need the locomotion of liquid metal droplets, thereby generating weak actuating forces and limiting their manoeuvrability. Here, a liquid metal engine (LME) is created to work as a jet thruster to continuously power a robot boat without the need of locomotion. In addition, the engine is electrically driven by surface tension without any mechanical moving parts. The structural design and the parameters of operation of the LME are investigated and optimized. Finally, the manipulation of the LME using a motor control unit is demonstrated for driving an untethered robot boat to realize complex locomotion with the precise control over the direction and speed. Thus, this LME could offer new opportunities for developing high‐performance liquid metal machines to power robotic systems. [ABSTRACT FROM AUTHOR]