Stabilising intrinsic room-temperature ferromagnetic two-dimensional semimetallic Cr2CTx MXene by epitaxial self-intercalation of H2O-etched Cr2(AlLi)C
Physical properties, such as electrochemical and electromagnetic properties, of two-dimensional MXenes can be improved by enhancing their stability. However, MXenes fabricated via acid etching contain defects, which affect their physical properties. In this study, a method to effectively remove Al r...
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Tsinghua University Press
2024-10-01
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| Series: | Journal of Advanced Ceramics |
| Subjects: | |
| Online Access: | https://www.sciopen.com/article/10.26599/JAC.2024.9220955 |
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| Summary: | Physical properties, such as electrochemical and electromagnetic properties, of two-dimensional MXenes can be improved by enhancing their stability. However, MXenes fabricated via acid etching contain defects, which affect their physical properties. In this study, a method to effectively remove Al residues using only water during MXene fabrication while maintaining structural stability is proposed. The fabrication and intercalation of MXenes are controlled via epitaxial self-intercalation of H2O-etched Cr2(AlLi)C. On the basis of this mechanism, the room-temperature ferromagnetism of two-dimensional few-layered Cr2CTx MXenes, which has a specific saturation magnetization of ~0.26 emu/g and a Curie temperature of > 353 K, is experimentally verified. The calculated electronic band structure implies that the semimetal Cr2CTx MXene has a band gap of 0.75 eV. This study opens new possibilities for the research and applications of industrial-scale manufacturing of MXenes and 2D semiconductors. |
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| ISSN: | 2226-4108 2227-8508 |