STEM与日常科技·英语30篇（1）

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超疏水涂层与荷叶效应

Lotus leaves repel water so effectively that droplets roll off, carrying dirt and microbes — a natural self-cleaning mechanism.
Scientists copied this by engineering micro- and nano-scale bumps on surfaces, then coating them with low-surface-energy wax-like materials.
These textures trap air pockets beneath water droplets, minimizing contact area and increasing contact angle above 150 degrees.
Applied to solar panels, such coatings prevent dust buildup and improve energy output by up to 12% in dry regions.
On aircraft wings, they reduce ice formation by limiting water adhesion during cold, humid flights.
Medical devices gain infection resistance, as bacteria struggle to attach and form biofilms on slippery, dry surfaces.
Unlike traditional waterproofing, superhydrophobic layers work without sealing pores — ideal for breathable fabrics and building facades.
Durability remains a challenge: abrasion or UV exposure can degrade nanostructures, prompting research into self-healing variants.