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Controllable deformation of salt water-filled carbon nanotubes using an electric field with application to molecular sieving

机译:使用电场可控地填充盐水的碳纳米管的变形及其在分子筛中的应用

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摘要

Precisely controlling the deformation of carbon nanotubes (CNTs) has practical application in the development of nanoscale functional devices, although it is a challenging task. Here, we propose a novel method to guide the deformation of CNTs through filling them with salt water and applying an electric field. With the electric field along the axial direction, the height of CNTs is enlarged by the axial electric force due to the internal ions and polar water molecules. Under an electric field with two mutually orthogonal components, the transverse electric force could further induce the bending deformation of CNTs. Based on the classical rod and beam theories, two mechanical models are constructed to verify and quantitatively describe the relationships between the tension and bending deformations of CNTs and the electric field intensity. Moreover, by means of the electric field-driven tension behavior of CNTs, we design a stretchable molecular sieve to control the flow rate of mixed gas and collect a single high-purity gas. The present work opens up new avenues in the design and fabrication of nanoscale controlling units.
机译:尽管这是一项艰巨的任务,但精确控制碳纳米管(CNT)的变形已在纳米级功能器件的开发中得到实际应用。在这里,我们提出了一种新颖的方法来引导CNT的变形,方法是将其充满盐水并施加电场。在沿轴向的电场作用下,由于内部离子和极性水分子的作用,CNTs的高度因轴向力而增大。在具有两个相互正交的分量的电场下,横向力可以进一步引起CNT的弯曲变形。基于经典的杆和梁理论,建立了两个力学模型,以验证和定量描述碳纳米管的张力和弯曲变形与电场强度之间的关系。此外,通过碳纳米管的电场驱动张力行为,我们设计了一种可拉伸的分子筛来控制混合气体的流速并收集单一的高纯度气体。目前的工作为纳米级控制单元的设计和制造开辟了新途径。

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