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Bandgap‐Coupled Template Autocatalysis toward the Growth of High‐Purity sp2 Nanocarbons
Advanced Science ( IF 14.3 ) Pub Date : 2021-02-18 , DOI: 10.1002/advs.202003078 Jun Gao 1 , Zhenxing Zhu 1 , Boyuan Shen 1 , Yunxiang Bai 1 , Silei Sun 1 , Fei Wei 1
Advanced Science ( IF 14.3 ) Pub Date : 2021-02-18 , DOI: 10.1002/advs.202003078 Jun Gao 1 , Zhenxing Zhu 1 , Boyuan Shen 1 , Yunxiang Bai 1 , Silei Sun 1 , Fei Wei 1
Affiliation
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Extraordinary properties and great application potentials of carbon nanotubes (CNT) and graphene fundamentally rely on their large‐scale perfect sp2 structure. Particularly for high‐end applications, ultralow defect density and ultrahigh selectivity are prerequisites, for which metal‐catalyzed chemical vapor deposition (CVD) is the most promising approach. Due to their structure and peculiarity, CNTs and graphene can themselves provide growth templates and nonlocal dual conductance, serving as template autocatalysts with tunable bandgap during the CVD. However, current growth kinetics models all focus on the external factors and edges. Here, the growth kinetics of sp2 nanocarbons is elaborated from the perspective of template autocatalysis and holistic electronic structure. After reviewing current growth kinetics, various representative works involving CVD growth of different sp2 nanocarbons are analyzed, to reveal their bandgap‐coupled kinetics and resulting selective synthesis. Recent progress is then reviewed, which has demonstrated the interlocking between the atomic assembly rate and bandgap of CNTs, with an explicit volcano dependence whose peak would be determined by the environment. In addition, the topological protection for perfect sp2 structure and the defect‐induced perturbation for the interlocking are discussed. Finally, the prospects for the kinetic selective growth of perfect nanocarbons are proposed.
中文翻译：
带隙耦合模板自催化生长高纯度 sp2 纳米碳
碳纳米管（CNT）和石墨烯的非凡性能和巨大应用潜力从根本上依赖于其大规模的完美sp 2结构。特别是对于高端应用，超低缺陷密度和超高选择性是先决条件，其中金属催化化学气相沉积（CVD）是最有前途的方法。由于其结构和特殊性，碳纳米管和石墨烯本身可以提供生长模板和非局域双电导，在 CVD 过程中充当带隙可调的模板自催化剂。然而，目前的增长动力学模型都关注外部因素和边缘。这里，从模板自催化和整体电子结构的角度详细阐述了sp 2纳米碳的生长动力学。在回顾了当前的生长动力学后，对涉及不同 sp 2纳米碳的 CVD 生长的各种代表性工作进行了分析，以揭示它们的带隙耦合动力学和由此产生的选择性合成。然后回顾了最近的进展，这证明了碳纳米管的原子组装速率和带隙之间的相互关联，并具有明显的火山依赖性，其峰值将由环境决定。此外，还讨论了完美 sp 2结构的拓扑保护和互锁的缺陷引起的扰动。最后，提出了完美纳米碳的动力学选择性生长的前景。
更新日期：2021-04-08
中文翻译：
带隙耦合模板自催化生长高纯度 sp2 纳米碳
碳纳米管（CNT）和石墨烯的非凡性能和巨大应用潜力从根本上依赖于其大规模的完美sp 2结构。特别是对于高端应用，超低缺陷密度和超高选择性是先决条件，其中金属催化化学气相沉积（CVD）是最有前途的方法。由于其结构和特殊性，碳纳米管和石墨烯本身可以提供生长模板和非局域双电导，在 CVD 过程中充当带隙可调的模板自催化剂。然而，目前的增长动力学模型都关注外部因素和边缘。这里，从模板自催化和整体电子结构的角度详细阐述了sp 2纳米碳的生长动力学。在回顾了当前的生长动力学后，对涉及不同 sp 2纳米碳的 CVD 生长的各种代表性工作进行了分析，以揭示它们的带隙耦合动力学和由此产生的选择性合成。然后回顾了最近的进展，这证明了碳纳米管的原子组装速率和带隙之间的相互关联，并具有明显的火山依赖性，其峰值将由环境决定。此外，还讨论了完美 sp 2结构的拓扑保护和互锁的缺陷引起的扰动。最后，提出了完美纳米碳的动力学选择性生长的前景。
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