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首页> 外文期刊>Nanotechnology >Electrostatic deposition of graphene in a gaseous environment: a deterministic route for synthesizing rolled graphenes?
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Electrostatic deposition of graphene in a gaseous environment: a deterministic route for synthesizing rolled graphenes?

机译：气态环境中石墨烯的静电沉积：合成轧制石墨烯的确定性途径？

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摘要

The synthesis of single-wall carbon nanotubes of desired diameters and chiralities is critical to the design of nanoscale electronic devices with desired properties. The existing methods are based on self-assembly, therefore lacking control over the diameters and chiralities. The present work reports a direct route for rolling graphene. Specifically, we found that the electrostatic deposition of graphene yielded: (i) flat graphene layers under high vacuum (10(-7) Torr), (ii) completely scrolled graphene under hydrogen atmosphere, (iii) partially scrolled graphene under nitrogen atmosphere, and (iv) no scrolling for helium atmospheres. Our study shows that the application of the electrostatic field facilitates the rolling of graphene sheets exposed to appropriate gases and allows the rolling of any size of graphene. The technique proposed here, in conjunction with a technique that produces graphene nanoribbons of uniform widths, will have significant impact on the development of carbon nanotube based devices. Furthermore, the present technique may be applied to obtain tubes/scrolls of other layered materials.
机译：具有所需直径和手性的单壁碳纳米管的合成对于设计具有所需特性的纳米级电子设备至关重要。现有方法基于自组装，因此缺乏对直径和手性的控制。本工作报告了滚动石墨烯的直接途径。具体而言，我们发现石墨烯的静电沉积产生：（i）在高真空（10（-7）Torr）下平坦的石墨烯层，（ii）在氢气氛下完全滚动的石墨烯，（iii）在氮气氛下部分滚动的石墨烯， （iv）氦气气氛不可滚动。我们的研究表明，静电场的施加有利于暴露于适当气体的石墨烯片材的轧制，并允许轧制任何尺寸的石墨烯。此处提出的技术，与产生均匀宽度的石墨烯纳米带的技术相结合，将对碳纳米管基器件的开发产生重大影响。此外，可以将本技术应用于获得其他层状材料的管/卷。

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