Direct growth of chirality‐controlled single‐walled carbon nanotubes (SWNTs) with metal catalyst free strategy, like cloning or epitaxial growth, has suffered from the low efficiency. The underlying problem is the activation of seed edge. Here an unexpectedly efficient microwave‐assisted pathway to regenerate SWNTs from carbon fragments on SiO₂/Si substrate is demonstrated via Raman spectroscopy and atomic force microscope (AFM) characterization. In this attempt, microwave irradiation provides fast heating to remove polar groups bonded to carbon nanotubes and reduce the spontaneous closure of tubes’ open ends. The survived SWNT and carbon fragments connected to it after plasma treatment are simply microwaved and then they serve as the template for regeneration. Scanning electron microscope and AFM characterizations indicate that the efficiency of the regeneration can reach 100%. And the regenerated SWNT has been proved without any change in chirality compared to the original SWNT. Electrical measurements on regenerated carbon nanotube films indicate 1 and 2 times increase in on/off ratio and on‐state current respectively than original carbon nanotube films obtained from solution‐phase separation, confirming the improvement of SWNT's quality. The microwave‐assisted regeneration is found to be highly effective and would be applied to improve the cloning efficiency of carbon nanotubes potentially.

中文翻译：

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微波辅助从碳碎片再生单壁碳纳米管

采用无金属催化剂的手性控制单壁碳纳米管（SWNT）的直接生长（如克隆或外延生长）效率低下。潜在的问题是种子边缘的激活。这是一种出乎意料的高效微波辅助途径，可从SiO ₂上的碳碎片再生SWNT通过拉曼光谱和原子力显微镜（AFM）表征证明了/ Si衬底。在这种尝试中，微波辐射可提供快速加热以去除键合到碳纳米管的极性基团，并减少管子开口端的自发闭合。仅将经过等离子处理后的幸存的SWNT和与之连接的碳片段进行微波处理，然后将其用作再生的模板。扫描电子显微镜和原子力显微镜表征表明，再生效率可以达到100％。与原始SWNT相比，已证明再生的SWNT在手性上没有任何变化。再生碳纳米管薄膜的电学测量表明，通/断比和通态电流分别比通过溶液相分离获得的原始碳纳米管薄膜增加了1倍和2倍，证实了SWNT的质量得到了改善。发现微波辅助再生非常有效，可用于潜在地提高碳纳米管的克隆效率。