Bioinspired Helical Microfibers from Microfluidics,Advanced Materials

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Bioinspired Helical Microfibers from Microfluidics
Advanced Materials ( IF 27.4 ) Pub Date : 2017-03-07 , DOI: 10.1002/adma.201605765
Yunru Yu ₁ , Fanfan Fu ₁ , Luoran Shang ₁ , Yao Cheng ₁ , Zhongze Gu ₁ , Yuanjin Zhao ₁

Affiliation

Helical objects are among the most important and landmark structures in nature, and represent an emerging group of materials with unique spiral geometry; because of their enriched physical and chemical properties, they can have multiple functionalities. However, the fabrication of such complex helical materials at the micro‐ or nanoscale level remains a challenge. Here, a coaxial capillary microfluidic system, with the functions of consecutive spinning and spiraling, is presented for scalable generation of helical microfibers. The generation processes can be precisely tuned by adjusting the flow rates, and thus the length, diameter, and pitch of the helical microfibers are highly controllable. Varying the injection capillary design of the microfluidics enables the generation of helical microfibers with structures such as the novel Janus, triplex, core–shell, and even double‐helix structures. The potential use of these helical microfibers is also explored for magnetically and thermodynamically triggered microsprings, as well as for a force indicator for contraction of cardiomyocytes. These indicate that such helical microfibers are highly versatile for different applications.

中文翻译：

来自微流控的生物启发螺旋微纤维

螺旋物体是自然界中最重要的标志性建筑之一，代表着新兴的具有独特螺旋几何形状的材料。由于其丰富的物理和化学特性，它们可以具有多种功能。然而，在微米或纳米级制造这种复杂的螺旋材料仍然是一个挑战。在此，提出了具有连续纺丝和螺旋作用的同轴毛细管微流体系统，用于可伸缩地产生螺旋微纤维。通过调节流速可以精确地调节生成过程，因此螺旋微纤维的长度，直径和螺距是高度可控的。改变微流体的注入毛细管设计，可以生成具有新型Janus，Triplex，核-壳，甚至双螺旋结构。这些螺旋微纤维的潜在用途还被探索用于磁性和热力学触发的微弹簧，以及用于心肌细胞收缩的力指示器。这些表明，这种螺旋微纤维对于不同的应用具有高度的通用性。

更新日期：2017-03-07

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