气泡摩擦成核
Tribonucleation of bubbles
摘要：
我们报告的成核的固体上的气泡轻轻地相互摩擦的液体。发现这种现象强烈地依赖于固体表面的材料和粗糙度。对于一个给定的表面，温度和气体含量，观察到的成长气泡的踪迹，如果摩擦力和速度超过一定的阈值。通过透明固体直接观察表明，尾迹中的每个气泡都是由几个微观气泡的早期合并引起的，这些气泡本身从固体之间形成的微观气穴中分离出来。从磨损痕迹的详细研究，与原子力和扫描电子显微镜成像，我们得出结论，这些微观气穴源于局部破裂的表面粗糙，可能增强了在新创建的表面的化学反应。我们的发现将有助于防止不希望的气泡形成，或者相反，用于“用气泡书写”，即，形成受控的微观气泡图案。
英文摘要：
We report on the nucleation of bubbles on solids that are gently rubbed against each other in a liquid. The phenomenon is found to depend strongly on the material and roughness of the solid surfaces. For a given surface, temperature, and gas content, a trail of growing bubbles is observed if the rubbing force and velocity exceed a certain threshold. Direct observation through a transparent solid shows that each bubble in the trail results from the early coalescence of several microscopic bubbles, themselves detaching from microscopic gas pockets forming between the solids. From a detailed study of the wear tracks, with atomic force and scanning electron microscopy imaging, we conclude that these microscopic gas pockets originate from a local fracturing of the surface asperities, possibly enhanced by chemical reactions at the freshly created surfaces. Our findings will be useful either for preventing undesired bubble formation or, on the contrary, for "writing with bubbles," i.e., creating controlled patterns of microscopic bubbles.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
