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Layered metal carbo-selenide Nb2CSe2 with van der Waals interlayer coupling

文献类型：期刊论文

作者Wang, Junchao1,2; Cheng, Renfei1; Hu, Tao3; Tang, Xinyue1,4; Liang, Yan1; Tian, Min5; Xiong, Ting5; Lu, Qiuhong5; Zhu, Qi6; Yang, Zhiqing5
刊名JOURNAL OF ADVANCED CERAMICS
出版日期2025
卷号14期号:1页码:10
关键词MXene Nb2CSe2 crystal structure electronic structure elastic properties interlayer coupling Raman spectroscopy friction coefficient
ISSN号2226-4108
DOI10.26599/JAC.2024.9221008
通讯作者Hu, Tao(thu@usts.edu.cn) ; Yang, Zhiqing(yangzq34@yahoo.com) ; Wang, Xiaohui(wang@imr.ac.cn) ; Zhou, Yanchun(yczhou@alum.imr.ac.cn)
英文摘要The stacking structure of Nb2CSe2, a newly synthesized layered metal carbo-selenide, was elucidated by scanning transmission electron microscopy. Nb2CSe2 features Se-Nb-C-Nb-Se quintuple atomic layers. These layers are stacked in Bernal mode. In this mode, Nb2CSe2 crystallizes in a trigonal symmetry (space group P 3 m 1, No. 164), with lattice parameters of a = 3.33 & Aring; and c = 18.20 & Aring;. Electronic structure calculations indicate that the metal carbo-selenide has Fermi energy crossing the bands where it touches to give a zero gap, indicating that it is an electronic conductor. As evidenced experimentally, the electrical conductivity is as high as 6.6x105 Sm-1, outperforming the counterparts in the MXene family. Owing to the layered structure, the bonding in Nb2CSe2 with an ionic formula of (Nb 1.48+ ) 2 (C 1.74- )(Se 0.61- ) 2 is highly anisotropic, with metallic-covalent-ionic bonding in intralayers and weak bonding between interlayers. The layered nature is further evidenced by elastic properties, interlayer energy, and friction coefficient determination. These characteristics indicate that Nb2CSe2 is an analog of molybdenum disulfide (MoS2), which is a typical binary van der Waals (vdW) solid. Moreover, vibrational properties are reported, which may offer an optical identification standard for new ternary vdW solids in spectroscopic studies, including Raman scattering and infrared absorption.
资助项目Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Basic and Applied Basic Research Program of Guangdong Province[2021B0301030003] ; Ji Hua Laboratory[X210141TL210]
WOS研究方向Materials Science
语种英语
WOS记录号WOS:001409360300002
出版者TSINGHUA UNIV PRESS
资助机构Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Basic and Applied Basic Research Program of Guangdong Province ; Ji Hua Laboratory
源URL  
专题金属研究所_中国科学院金属研究所
通讯作者Hu, Tao; Yang, Zhiqing; Wang, Xiaohui; Zhou, Yanchun
作者单位1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Suzhou Univ Sci & Technol, Inst Mat Sci & Devices, Sch Mat Sci & Engn, Suzhou 215009, Peoples R China
4.Shenyang Ligong Univ, Sch Mat Sci & Engn, Shenyang 110159, Peoples R China
5.Ji Hua Lab, Foshan 528000, Peoples R China
6.Northeastern Univ, Sch Mat Sci & Engn, Key Lab Anisotropy & Texture Mat, Minist Educ, Shenyang 110819, Peoples R China
7.Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Junchao,Cheng, Renfei,Hu, Tao,et al. Layered metal carbo-selenide Nb2CSe2 with van der Waals interlayer coupling[J]. JOURNAL OF ADVANCED CERAMICS,2025,14(1):10.
APA Wang, Junchao.,Cheng, Renfei.,Hu, Tao.,Tang, Xinyue.,Liang, Yan.,...&Zhou, Yanchun.(2025).Layered metal carbo-selenide Nb2CSe2 with van der Waals interlayer coupling.JOURNAL OF ADVANCED CERAMICS,14(1),10.
MLA Wang, Junchao,et al."Layered metal carbo-selenide Nb2CSe2 with van der Waals interlayer coupling".JOURNAL OF ADVANCED CERAMICS 14.1(2025):10.

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来源：金属研究所

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