Research press release


Nature Communications

Physics: Putting a spin on droplets



今回の研究で、Yanlin Songたちは、化学的パターン形成法を採用して、疎水性(撥水性)の低接着性表面に高接着性のらせんパターンを作り出した。この表面に液滴がぶつかると、表面パターンによって非軸対称のピン止め力(軸周りに発生する非対称の力)が生じ、跳ね返った液滴が回転運動した。


A method to create a surface that makes water droplets gyrate when they rebound off it, with rotational speeds exceeding 7,300 revolutions per minute, is described in Nature Communications this week. The findings may have applications in hydro-energy collection, self-cleaning and anti-icing processes.

When a droplet hits a surface, the outcome (if it rebounds or splashes) depends on the structure and chemical properties of the solid. However, owing to the deformability of the droplet and how quickly the interaction between the impacting droplet and solid takes place, it is challenging to manipulate this behaviour.

Yanlin Song and colleagues introduce a chemical patterning method in which high-adhesive spirals are surrounded by hydrophobic (water repelling), low-adhesive regions. When a droplet hits the surface, these patterns induce non-axisymmetric pinning forces (non-symmetrical forces around an axis) which make the droplet gyrate as it rebounds.

The authors suggest that the observed process opens up a promising avenue for the delicate control of liquid motion.

doi: 10.1038/s41467-019-08919-2

「Nature 関連誌注目のハイライト」は、ネイチャー広報部門が報道関係者向けに作成したリリースを翻訳したものです。より正確かつ詳細な情報が必要な場合には、必ず原著論文をご覧ください。

メールマガジンリストの「Nature 関連誌今週のハイライト」にチェックをいれていただきますと、毎週最新のNature 関連誌のハイライトを皆様にお届けいたします。