通过吸收太阳光增强超疏水性的透明光热超表面
Transparent Photothermal Metasurfaces Amplifying Superhydrophobicity by Absorbing Sunlight
摘要：
在过去的几年里，赋予和保持表面超疏水性受到了广泛的研究关注，这是由广泛的重要应用所驱动的，并由材料和表面纳米工程的进步所实现。研究人员已经研究了温度对液滴-表面相互作用的影响，当液体成核表现出自身时，这带来了额外的挑战，因为随后冷凝到表面纹理中，从而损害其抗润湿行为。同时保持表面的透明度也是一个额外的重大挑战。通常，所提出的解决方案受到工作温度的限制，或者不利于通过表面的可见性。在这里，我们介绍了一种可扩展的方法，采用等离子体光热元表面复合材料，能够收集阳光和自然加热表面，在具有挑战性的环境条件下保持防水性和透明度，否则会强烈促进冷凝和雾化。我们证明，这些表面，当被阳光照射时，可以通过抑制纹理内的冷凝物形成来防止撞击水滴的刺穿，即使当液滴与表面的温差为50°C时，也可以保持透明度。我们还展示了如何将相同的透明超颖表面涂层与分层的微米和纳米粗糙纹理相结合并协同工作，从而同时产生优异的压力驱动的抗刺穿性，并避免水成核和过冷条件下相关的可能结霜。我们的工作可以找到一系列应用，作为一种可持续的解决方案，防止水冲击窗户，眼镜和光学元件等表面。
英文摘要：
Imparting and maintaining surface superhydrophobicity is receiving significant research attention over the last several years, driven by a broad range of important applications and enabled by advancements in materials and surface nanoengineering. Researchers have investigated the effect of temperature on droplet-surface interactions, which poses additional challenges when liquid nucleation manifests itself, due to ensuing condensation into the surface texture that compromises its anti-wetting behavior. Maintaining surface transparency at the same time poses an additional and significant challenge. Often, the solutions proposed are limited by working temperatures or are detrimental to visibility through the surface. Here we introduce a scalable method employing plasmonic photothermal metasurface composites, able to harvest sunlight and naturally heat the surface, sustaining water repellency and transparency under challenging environmental conditions where condensation and fogging would otherwise be strongly promoted. We demonstrate that these surfaces, when illuminated by sunlight, can prevent impalement of impacting water droplets, even when the droplet to surface temperature difference is 50°C, by suppressing condensate formation within the texture, maintaining transparency. We also show how the same transparent metasurface coating could be combined and work collaboratively with hierarchical micro- and nanorough textures, resulting in simultaneous superior pressure-driven impalement resistance and avoidance of water nucleation and related possible frosting in supercooled conditions. Our work can find a host of applications as a sustainable solution against impacting water on surfaces such as windows, eyewear, and optical components.
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。
