On-Surface Synthesis of Graphene Nanoribbons Catalyzed by Ni Atoms
On-Surface Synthesis of Graphene Nanoribbons Catalyzed by Ni Atoms
复制标题
Ni原子催化石墨烯纳米带的表面合成
DOI：
10.1002/asia.201800610
复制
发表时间：
2018
影响因子：
4.1
通讯作者：
Wang Weihua
中科院分区：
文献类型：
--
作者：
Xing Shuya;Liu Bing;Wang Wenquan;Guo Ji;ong;Wang Weihua
卤素芳烃可以通过多步表面反应合成纳米级石墨烯纳米带，但外源过渡金属原子在这些反应中的催化作用仍有待探索。在低温扫描隧道显微镜下，我们研究了在Ni原子存在下，由10,10 ' -二溴- 9,9 ' -二溴基前体在表面合成石墨烯纳米带的过程。镍原子不仅在300 K时作为脱溴的催化剂，导致有机金属中间体的形成，而且在673 K时促进石墨烯纳米带之间的融合反应。我们的工作展示了一种更有效的制造熔融石墨烯纳米带的方法。
Nanometer‐wide graphene nanoribbons can be synthesized from halogen aromatics through multistep on‐surface reactions, but the catalytic role of extrinsic transition‐metal atoms in these reactions are still to be explored. Here by low‐temperature scanning tunneling microscopy, we investigated the on‐surface synthesis of graphene nanoribbons from 10,10′‐dibromo‐9,9′‐bianthryl precursors in the presence of Ni atoms. Ni atoms not only act as catalysts in debromination and lead to the formation of an organometallic intermediate at 300 K, but also prompt the fusion reaction between graphene nanoribbons at 673 K. Our work demonstrates a more efficient way to fabricate fused graphene nanoribbons.