液滴“罗盘”描绘薄膜张力 | PRL 论文推荐

环球科学科研圈 · 公众号 · 科研 · 2017-06-17 20:13

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【标题】Liquid Droplets Act as “Compass Needles” for the Stresses in a Deformable Membrane

【作者】Rafael D. Schulman, René Ledesma-Alonso, Thomas Salez, Elie Raphaël, and Kari Dalnoki-Veress

【刊期】Phys. Rev. Lett. 118, 198002 (2017)

【DOI】10.1103/PhysRevLett.118.198002

【摘要】We examine the shape of droplets atop deformable thin elastomeric films prepared with an anisotropic tension. As the droplets generate a deformation in the taut film through capillary forces, they assume a shape that is elongated along the high tension direction. By measuring the contact line profile, the tension in the membrane can be completely determined. Minimal theoretical arguments lead to predictions for the droplet shape and membrane deformation that are in excellent agreement with the data. On the whole, the results demonstrate that droplets can be used as probes to map out the stress field in a membrane.

【链接】 https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.118.198002

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