A Universal Atomic Substitution Conversion Strategy Towards Synthesis of Large‑Size Ultrathin Nonlayered Two‑Dimensional Materials

作     者：Mei Zhao Sijie Yang Kenan Zhang Lijie Zhang Ping Chen Sanjun Yang Yang Zhao Xiang Ding Xiaotao Zu Yuan Li Yinghe Zhao Liang Qiao Tianyou Zhai Mei Zhao;Sijie Yang;Kenan Zhang;Lijie Zhang;Ping Chen;Sanjun Yang;Yang Zhao;Xiang Ding;Xiaotao Zu;Yuan Li;Yinghe Zhao;Liang Qiao;Tianyou Zhai

作者机构：School of PhysicsUniversity of Electronic Science and Technology of China(UESTC)Chengdu 610054People’s Republic of China State Key Laboratory of Materials Processing and Die&Mould TechnologySchool of Materials Science and EngineeringHuazhong University of Science and Technology(HUST)Wuhan 430074People’s Republic of China School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006People’s Republic of China Key Laboratory of Carbon Materials of Zhejiang ProvinceInstitute of New Materials and Industrial TechnologiesCollege of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2021年第13卷第11期

页      面：79-91页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 0817[工学-化学工程与技术] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：This work was supported by National Natural Science Foundation of China(21825103,11774044,52072059) the Hubei Provincial Natural Science Foundation of China(2019CFA002) 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 

主　　题：Nonlayered 2D materials Large-size ultrathin CdS flakes Atomic substitution conversion Layered-nonlayered structural transformation 

摘      要：Nonlayered two-dimensional(2D)materials have attracted increasing attention,due to novel physical properties,unique surface structure,and high compatibility with microfabrication ***,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 ***,a general atomic substitution conversion strategy is proposed to synthesize large-size,ultrathin nonlayered 2D *** 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 *** size and thickness of CdS flakes can be controlled by the CdI2 *** 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 *** 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.