Cui Guoliang, Qi Jiajie, Liang Zhihua, Zeng Fankai, Zhang Xiaowen, Xu Xiaozhi, Liu Kaihui
Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter, Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics, South China Normal University, Guangzhou 510631, China.
Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Frontier Research Institute for Physics, South China Normal University, Guangzhou 510631, China.
Precis Chem. 2024 Apr 5;2(7):330-354. doi: 10.1021/prechem.3c00122. eCollection 2024 Jul 22.
Among the various two-dimensional (2D) materials, more than 99% of them are noncentrosymmetric. However, since the commonly used substrates are generally centrosymmetric, antiparallel islands are usually inevitable in the growth of noncentrosymmetric 2D materials because of the energetic equivalency of these two kinds of antiparallel islands on centrosymmetric substrates. Therefore, achieving the growth of noncentrosymmetric 2D single crystals has long been a great challenge compared with the centrosymmetric ones like graphene. In this review, we presented the remarkable efforts and progress in the past decade, through precise chemical processes. We first discussed the great challenge and possible strategies in the growth of noncentrosymmetric 2D single crystals. Then, we focused on the advancements made in producing representative noncentrosymmetric 2D single crystals, including hexagonal boron nitride (hBN), transition metal dichalcogenides (TMDs), and other noncentrosymmetric 2D materials. At last, we summarized and looked forward to future research on the growth of layer-, stacking-, and twist-controlled noncentrosymmetric 2D single crystals and their heterostructures.
在各种二维（2D）材料中，超过99%是无中心对称的。然而，由于常用的衬底通常是中心对称的，在中心对称衬底上生长无中心对称二维材料时，由于这两种反平行岛的能量等效性，反平行岛通常是不可避免的。因此，与石墨烯等中心对称二维材料相比，实现无中心对称二维单晶的生长长期以来一直是一个巨大的挑战。在这篇综述中，我们介绍了过去十年通过精确化学过程所做出的显著努力和取得的进展。我们首先讨论了无中心对称二维单晶生长中的巨大挑战和可能的策略。然后，我们重点介绍了在制备代表性无中心对称二维单晶方面取得的进展，包括六方氮化硼（hBN）、过渡金属二硫属化物（TMDs）以及其他无中心对称二维材料。最后，我们总结并展望了未来关于层控、堆叠控和扭曲控无中心对称二维单晶及其异质结构生长的研究。
