This Rapid Communication presents the self-propelled and controllable motion of liquid metal droplets, which is driven by surface tension and does not depend on any external force field. Its motion speed and direction can be controlled just as a projectile fired by a slingshot: The liquid metal droplet is the projectile, and a substrate surface serves as the bowstring. This motion provides a potential mechanism for the application of liquid metals in soft robotics, drug delivery, chip cooling, and other fields.

中文翻译：

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液态金属弹弓

这种快速通信显示了液态金属液滴的自推进和可控制的运动，该运动是由表面张力驱动的，并且不依赖于任何外力场。可以像弹弓发射的弹丸一样控制其运动速度和方向：液态金属液滴是弹丸，基底表面充当弓弦。该运动为液态金属在软机器人，药物输送，芯片冷却和其他领域的应用提供了潜在的机制。