A Universal Atomic Substitution Conversion Strategy Towards Synthesis of Large-Size Ultrathin Nonlayered Two-Dimensional Materials
Mei Zhao Yuan Li Yinghe Zhao Liang Qiao Tianyou Zhai Sijie Yang Kenan Zhang Lijie Zhang Ping Chen Sanjun Yang Yang Zhao Xiang Ding Xiaotao Zu
纳微快报（英文）2021，Vol.13Issue(11)：79-91,13.
纳微快报（英文）2021，Vol.13Issue(11)：79-91,13.
A Universal Atomic Substitution Conversion Strategy Towards Synthesis of Large-Size Ultrathin Nonlayered Two-Dimensional Materials
A Universal Atomic Substitution Conversion Strategy Towards Synthesis of Large?Size Ultrathin Nonlayered Two?Dimensional Materials
摘要
Abstract
Nonlayered two-dimen sional (2D) materials have attracted increasing attention, due to novel physical properties, unique surface structure, and high compatibility with microfabrication technique. However, owing to the inherent strong covalent bonds, the direct synthesis of 2D planar structure from nonlayered materials, especially for the realization of large-size ultrathin 2D nonlayered materials, is still a huge challenge. Here, a general atomic substitution conversion strategy is proposed to synthesize large-size, ultrathin non layered 2D materials. Taking nonlayered CdS as a typical example, large-size ultrathin nonlayered CdS single-crystalline flakes are successfully achieved via a facile low-temperature chemical sulfurization method, where pre-grown layered -CdI2 flakes are employed as the precursor via a simple hot plate assisted vertical vapor deposition method. The size and thickness of CdS flakes can be controlled by the -CdI2 precursor. The growth mechanism is ascribed to the chemical substitution reaction from I to S atoms between -CdI2 and CdS, which has been evidenced by experiments and theoretical calculations. The atomic substitution conversion strategy demonstrates that the existing 2D layered materials can serve as the precursor for difficult-to-synthesize nonlayered 2D materials, providing a bridge between layered and nonlayered materials, meanwhile realizing the fabrication of large-size ultrathin nonlayered 2D materials.关键词
Nonlayered 2D materials/Large-size ultrathin CdS flakes/Atomic substitution conversion/Layered-nonlayered structural transformationKey words
Nonlayered 2D materials/Large-size ultrathin CdS flakes/Atomic substitution conversion/Layered-nonlayered structural transformation引用本文复制引用
Mei Zhao,Yuan Li,Yinghe Zhao,Liang Qiao,Tianyou Zhai,Sijie Yang,Kenan Zhang,Lijie Zhang,Ping Chen,Sanjun Yang,Yang Zhao,Xiang Ding,Xiaotao Zu..A Universal Atomic Substitution Conversion Strategy Towards Synthesis of Large-Size Ultrathin Nonlayered Two-Dimensional Materials[J].纳微快报（英文）,2021,13(11):79-91,13.基金项目
This work was supported by National Natural Science Foundation of China(21825103,11774044,52072059),the Hubei Provincial Natural Science Foundation of China(2019CFA002),and the Fundamental Research Funds for the Central Universities(2019kfyXMBZ018 and 2020kfyXJJS050).We also thank the technical support from Analytical and Testing Center in Huazhong University of Science and Technology. （21825103,11774044,52072059）
