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Graphite induced periodical self-actuation of liquid metal

机译：石墨诱导液态金属的周期自动致动

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摘要

Self-actuation phenomena of liquid metal spheres in NaOH solution, including spreading, oscillating and stretching, induced by graphite alone were demonstrated for the first time. A liquid metal sphere could spontaneously spread on the surface of the graphite once immersed in the NaOH solution. The surface tension gradient on the sphere induced by the graphite/liquid metal galvanic cell was responsible for this deformation. When a liquid metal sphere was leaned against the side of a piece of graphite, it could oscillate periodically. As the sphere contacted the graphite, it rapidly collapsed, while the curvature radius of the sphere at the contact point decreased. Also, as the capillary force imposed on the sphere was larger than the friction force, the sphere recovered its original spherical shape. The surface tension of the liquid metal sphere acted as the restoring force of the oscillatory movement. Further, a phenomenon of resonance could be observed when two spheres were laid respectively on the top and the side of the graphite. The vibration of the top sphere was induced by the vibration of the side sphere. This finding provides a novel enhancement for the fabrication of future liquid metal beating heart systems and graphite/liquid metal-based batteries or machines.
机译：首次证明了石墨溶液中的NaOH溶液中液态金属球体的自动致动现象，包括展开，振荡和拉伸，由石墨诱导诱导。液体金属球体可以在石墨的表面上自发地涂抹在NaOH溶液中。石墨/液态金属电池诱导的球体上的表面张力梯度负责这种变形。当液态金属球体靠在一块石墨的侧面时，它可以定期振荡。当球体接触石墨时，它迅速折叠，而在接触点处的球体的曲率半径降低。而且，由于施加在球体上的毛细力大于摩擦力，因此球体回收其原始球形。液态金属球的表面张力作用为振荡运动的恢复力。此外，当分别在石墨的顶部和一侧分别铺设两个球体时，可以观察到共振的现象。通过侧球的振动引起顶部球体的振动。该发现提供了一种新颖的增强，用于制造未来的液体金属跳动心脏系统和石墨/液态金属金属电池或机器。

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  • 来源
    《RSC Advances》 |2016年第65期|共7页
  • 作者

    Wang Lei; Liu Jing;

  • 作者单位

    Chinese Acad Sci Beijing Key Lab CryoBiomed Engn Tech Inst Phys &

    Chem Beijing 100190 Peoples R China;

    Chinese Acad Sci Beijing Key Lab CryoBiomed Engn Tech Inst Phys &

    Chem Beijing 100190 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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