范德瓦尔斯力
材料科学
催化作用
纳米材料
化学物理
金属
化学稳定性
石墨烯
纳米技术
化学
分子
有机化学
冶金
作者
Zidong Du,Zongju Cheng,Qi Zhao,Haiyang Wang,Quanxin Zhu,Hao Chen,Xiao Chen,Bin Li,Shuyuan Yang
出处
期刊:Cornell University - arXiv
日期:2023-02-15
被引量:1
标识
DOI:10.48550/arxiv.2302.07718
摘要
Two-dimensional (2D) nanomaterials derived from non-van der Waals solids are promising due to their fantastic physical and chemical properties, but it remains challenging to obtain 2D atomic laminates with high stability owing to the strong intrinsic covalent/metallic bonds and highly exposed active surface. Here, we report a versatile and scalable protocol to produce 2D atomic laminates, based on an unexpected topological transformation of MAX phases under hydrogen chloride gas, and/or subsequent reconstruction under some programmed gases/vapors. In contrast to the known approaches with liquid or molten medium, our method involves in a gas-phase reaction with fast thermodynamics for A layers and positive Gibbs free energies for MX slabs. Remarkably, through subsequent reconstruction in some active gases/vapors (O2, H2S, P, CH4, Al and Sn metal vapors), a big family of 2D atomic laminates with elusive configurations as well as high chemical/thermal stabilities and tunable electrical properties (from metallic to semiconductor-like behaviors) are achieved. Moreover, the resultant 2D atomic laminates can be facilely scaled up to 10 kilograms. We believe that the 2D atomic laminates would have broad applications in catalysis, energy storage, electromagnetic shielding interface and microwave absorption.
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