中国科学院宁波材料技术与工程研究所黄庆团队报道了化学剪刀介导的层状过渡金属碳化物的结构编辑。相关研究成果发表在2023年3月17日出版的国际学术期刊《科学》。

夹层层状材料具有独特的性能，是重要二维（2D）材料的前驱体。然而，可以扩展2D材料家族非范德华结构的嵌入是困难的。

该文中，研究人员报道了层状碳化物（MAX相）及其2D衍生物（MXenes）的结构编辑方案。间隙打开和物种插入阶段分别由化学剪刀和中间剂介导，这产生了一大家族具有非常规元素和结构的MAX相，以及具有多功能末端的MXenes。用金属剪刀去除MXenes中的末端，然后用原子嵌入缝合2D碳化物纳米片，导致MAX相和金属嵌入的2D碳化物家族的重建，这两者都可能推动从能源到印刷电子等领域的发展。

附：英文原文

Title: Chemical scissor–mediated structural editing of layered transition metal carbides

Author: Haoming Ding, Youbing Li, Mian Li, Ke Chen, Kun Liang, Guoxin Chen, Jun Lu, Justinas Palisaitis, Per O. . Persson, Per Eklund, Lars Hultman, Shiyu Du, Zhifang Chai, Yury Gogotsi, Qing Huang

Issue&Volume: 2023-03-17

Abstract: Intercalated layered materials offer distinctive properties and serve as precursors for important two-dimensional (2D) materials. However, intercalation of non–van der Waals structures, which can expand the family of 2D materials, is difficult. We report a structural editing protocol for layered carbides (MAX phases) and their 2D derivatives (MXenes). Gap-opening and species-intercalating stages were respectively mediated by chemical scissors and intercalants, which created a large family of MAX phases with unconventional elements and structures, as well as MXenes with versatile terminals. The removal of terminals in MXenes with metal scissors and then the stitching of 2D carbide nanosheets with atom intercalation leads to the reconstruction of MAX phases and a family of metal-intercalated 2D carbides, both of which may drive advances in fields ranging from energy to printed electronics.

DOI: add5901

Source: https://www.science.org/doi/10.1126/science.add5901