Key Laboratory of Bioinspired Smart Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, China.
Adv Mater. 2021 Jun;33(23):e2007152. doi: 10.1002/adma.202007152. Epub 2021 Apr 23.
The dynamic spreading phenomenon of liquids is vital for both understanding wetting mechanisms and visual reaction time-related applications. However, how to control and accelerate the spreading process is still an enormous challenge. Here, a unique microchannel and nanofiber array morphology enhanced rapid superspreading (RSS) effect on animals' corneas with a superspreading time (ST) of 830 ms is found, and the respective roles of the nanofiber array and the microchannel in the RSS effect are explicitly demonstrated. Specifically, the superspreading is induced by in-/out-of-plane nanocapillary forces among the nanofiber array; the microchannel is responsible for tremendously speeding up the superspreading process. Inspired by the RSS strategy, not only is an RSS surface fabricated with an ST of only 450 ms, which is, respectively, more than 26 and 1.8 times faster than conventional superamphiphilic surfaces and animal's corneas and can be applied as RSS surfaces on video monitors to record clear videos, but also it is demonstrated that the RSS effect has tremendous potential as advanced ophthalmic material surfaces to enhance its biocompatibility for clear vision.
液体的动态扩展现象对于理解润湿机制和与视觉反应时间相关的应用至关重要。然而，如何控制和加速扩展过程仍然是一个巨大的挑战。在这里，我们发现了一种独特的微通道和纳米纤维阵列形态，能够在动物角膜上实现快速超级扩展（RSS）效应，超级扩展时间（ST）为 830ms，并且明确展示了纳米纤维阵列和微通道在 RSS 效应中的各自作用。具体来说，超级扩展是由纳米纤维阵列中的内/外平面纳米毛细管力引起的；微通道则负责极大地加速超级扩展过程。受 RSS 策略的启发，我们不仅制造了一个具有 ST 仅为 450ms 的 RSS 表面，其分别比传统的超双疏表面和动物角膜快 26 倍和 1.8 倍以上，并且可以用作视频监视器上的 RSS 表面来记录清晰的视频，而且还证明了 RSS 效应具有巨大的潜力，可以作为先进的眼科材料表面来提高其生物相容性，以实现清晰的视力。
