Zhao Shasha, Wang Luyang, Fu Lei
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China.
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China.
iScience. 2019 Oct 25;20:527-545. doi: 10.1016/j.isci.2019.09.038. Epub 2019 Sep 28.
Two-dimensional atomic single crystals (2DASCs) have drawn immense attention because of their potential for fundamental research and new technologies. Novel properties of 2DASCs are closely related to their atomic structures, and effective modulation of the structures allows for exploring various practical applications. Precise vapor-phase synthesis of 2DASCs with tunable thickness, selectable phase, and controllable chemical composition can be realized to adjust their band structures and electronic properties. This review highlights the latest advances in the precise vapor-phase synthesis of 2DASCs. We thoroughly elaborate on strategies toward the accurate control of layer number, phase, chemical composition of layered 2DASCs, and thickness of non-layered 2DASCs. Finally, we suggest forward-looking solutions to the challenges and directions of future developments in this emerging field.
二维原子单晶(2DASCs)因其在基础研究和新技术方面的潜力而备受关注。2DASCs的新颖特性与其原子结构密切相关,对结构的有效调控有助于探索各种实际应用。通过精确的气相合成,可以实现具有可调厚度、可选择相和可控化学成分的2DASCs,从而调整其能带结构和电子特性。本文综述重点介绍了2DASCs精确气相合成的最新进展。我们详细阐述了精确控制层状2DASCs的层数、相、化学成分以及非层状2DASCs厚度的策略。最后,我们针对这一新兴领域未来发展面临的挑战和方向提出了前瞻性的解决方案。