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Sheath-dependent orientation control of carbon nanofibres and carbon nanotubes during plasma-enhanced chemical vapour deposition

机译:等离子体增强化学气相沉积过程中碳纳米纤维和碳纳米管的鞘依赖取向控制

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摘要

The aligned growth of carbon nanofibres (CNFs) and carbon nanotubes (CNTs) via a simple sheath-dependent technique for orientation control is demonstrated. Significant difference in the alignment behaviour of CNFs/CNTs, involving the transition of sheath-dependent electric fields, is found to depend on the relation between the sheath width and the sample dimension. The electric field within the plasma sheath contributes to the aligned growth of CNFs/CNTs with an absolute orientation, and can be used to direct the assembly of CNFs/CNTs in a predetermined manner relative to the substrate by tilting the sample in a sheath region. The consequent application for synthesis of kinked carbon nanostructures by altering the alignment angle to the substrate during growth is also achieved.
机译:碳纳米纤维(CNFs)和碳纳米管(CNTs)通过简单的依赖于鞘的定向控制技术的定向生长得到了证明。发现CNFs / CNTs排列行为的显着差异(包括与鞘相关的电场的转变)取决于鞘宽度与样品尺寸之间的关系。等离子体鞘内的电场有助于CNF / CNT以绝对方向排列生长,并且可以通过在鞘区域内倾斜样品来以预定方式相对于基底引导CNF / CNT的组装。通过在生长过程中改变与衬底的取向角,也可以用于合成弯折的碳纳米结构。

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