Initiation of carbon nanotube growth by well-defined carbon nanorings
Initiation of carbon nanotube growth by well-defined carbon nanorings
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DOI：
10.1038/nchem.1655
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发表时间：
2013-07-01
期刊：
影响因子：
21.8
通讯作者：
Itami, Kenichiro
中科院分区：
文献类型：
--
作者：
Omachi, Haruka;Nakayama, Takuya;Itami, Kenichiro
碳纳米管（CNTs）是由sp（2）杂化的碳原子组成的管状分子实体，目前被生产为包含各种直径和不同侧壁结构的管的混合物。碳纳米管的电子和光学性质是由它们的直径和侧壁结构决定的，因此均匀直径、单手性碳纳米管的受控合成--一个重大的化学挑战--将提供具有可预测性质的纯样品。在这里，我们报告了一个合理的自下而上的方法来合成结构均匀的碳纳米管使用碳纳米环（环对苯）作为模板和乙醇作为碳源。所形成的CNT的平均直径接近于所使用的碳纳米环的平均直径，这支持CNT形成中的“从模板生长”机制的操作。这种自下而上的有机化学方法本质上不同于其他传统的方法，使碳纳米管，如果它可以充分优化，提供了一种途径，结构均匀的碳纳米管的可编程合成。
Carbon nanotubes (CNTs), tubular molecular entities that consist of sp(2)-hybridized carbon atoms, are currently produced as mixtures that contain tubes of various diameters and different sidewall structures. The electronic and optical properties of CNTs are determined by their diameters and sidewall structures and so a controlled synthesis of uniform-diameter, single-chirality CNTs-a significant chemical challenge-would provide access to pure samples with predictable properties. Here we report a rational bottom-up approach to synthesize structurally uniform CNTs using carbon nanorings (cycloparaphenylenes) as templates and ethanol as the carbon source. The average diameter of the CNTs formed is close to that of the carbon nanorings used, which supports the operation of a 'growth-from-template' mechanism in CNT formation. This bottom-up organic chemistry approach is intrinsically different from other conventional approaches to making CNTs and, if it can be optimized sufficiently, offers a route to the programmable synthesis of structurally uniform CNTs.