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Iron assisted growth of copper-tipped multi-walled carbon nanotubes

机译:铁辅助生长铜尖端多壁碳纳米管

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Carbon nanotubes incorporating copper are highly sought after for nanoclectronic applications. Indeed, several recent studies have demonstrated the production of copper-tipped nanotubes using the chemical vapor deposition method. Here we present the growth and detailed characterization of such copper-tipped nanotubes. The nanotubes grown were of a 'bamboo-like' structure, consisting of stacked cups of graphene, and were produced by chemical vapor deposition employing iron and copper nanoparticles as a catalyst and metal source respectively. Transmission electron microscopy and electron holography analysis of the tips of these nanotubes revealed a small crystalline iron particle on the inner side of the copper tip, with the nanotube structure encapsulating the iron. This form of growth may allow the formation of similar structures with various other metal-tipped carbon nanotubes to be manufactured.
机译:对于纳米电子应用而言,极力寻求掺入铜的碳纳米管。实际上,最近的一些研究已经证明了使用化学气相沉积法生产铜尖纳米管的方法。在这里,我们介绍了这种铜尖端纳米管的生长和详细的表征。所生长的纳米管具有“竹子状”结构,由堆叠的石墨烯杯组成,分别通过化学气相沉积法制造,分别使用铁和铜纳米粒子作为催化剂和金属源。对这些纳米管尖端的透射电子显微镜和电子全息分析表明,在铜尖端的内侧有一个小的结晶铁颗粒,纳米管结构包裹了铁。这种生长形式可以与要制造的各种其他带有金属的碳纳米管形成相似的结构。

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