Bioinspired Azimuthally Varying Nanoscale Cu Columns on Acupuncture Needles for Fog Collection,ACS Applied Nano Materials

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Bioinspired Azimuthally Varying Nanoscale Cu Columns on Acupuncture Needles for Fog Collection
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2021-09-15 , DOI: 10.1021/acsanm.1c01288
Morteza Aliabadi ₁ , Afsaneh Zarkesh ₁ , Hossein Siampour ₂ , Sara Abbasian ₃ , Mohammadjavad Mahdavinejad ₁ , Ahmad Moshaii _{2,

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Affiliation

Inspired by the natural fog collection of the Namib beetles and desert cacti, a bioinspired design (BID) needle with a remarkable wettability gradient is introduced. Previous studies about directional water transport have rarely investigated wettability gradients along the azimuthal direction of a needle. Here, we have reported on the fast droplet transportation on a BID needle improved by azimuthally varying Cu nanocolumns on a steel acupuncture needle. We have employed glancing angle deposition (GLAD) to produce gradient porous Cu nanocolumns directly on the curved surface of an acupuncture needle. Due to the engineered gradient on such a surface, a high-speed fog collection of V = 134.8 mm·s^–1 and a remarkable acceleration of a = 848.3 mm·s^–2 were observed for the droplets on the needle surface. All periodically created droplets were easily swept along the 40 mm needle path in less than 0.5 s. Such efficient fog collection and fast droplet transportation in the proposed azimuthally nonuniform structure have many potential applications, from fog collection in low water regions to water transportation in microsystems.

中文翻译：

针灸针上仿生方位变化纳米级铜柱用于雾气收集

受纳米布甲虫和沙漠仙人掌的天然雾气系列的启发，引入了具有显着润湿性梯度的仿生设计 (BID) 针头。以前关于定向水传输的研究很少研究沿针方位角方向的润湿性梯度。在这里，我们报告了通过在钢针灸针上的方位角变化 Cu 纳米柱改进的 BID 针上的快速液滴传输。我们采用掠射角沉积 (GLAD) 直接在针灸针的曲面上生产梯度多孔铜纳米柱。由于这种表面上的工程梯度，V = 134.8 mm·s ^–1的高速雾收集和a = 848.3 mm·s ^–2的显着加速度观察针头表面的液滴。所有周期性产生的液滴都可以在不到 0.5 秒的时间内沿着 40 毫米的针路径轻松扫过。在所提出的方位角非均匀结构中，这种高效的雾收集和快速的液滴传输具有许多潜在的应用，从低水区的雾收集到微系统中的水传输。

更新日期：2021-09-24

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