Intrinsic Ferromagnetism in Mn-Substituted MoS2 Nanosheets Achieved by Supercritical Hydrothermal Reaction

Hao Tan, Wei Hu, Chao Wang, Chao Ma, Hengli Duan, Wensheng Yan*, Liang Cai, Peng Guo, Zhihu Sun, Qinghua Liu, Xusheng Zheng, Fengchun Hu, Shiqiang Wei

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

Doping atomically thick nanosheets is a great challenge due to the self-purification effect that drives the precipitation of dopants. Here, a breakthrough is made to dope Mn atoms substitutionally into MoS2 nanosheets in a sulfur-rich supercritical hydrothermal reaction environment, where the formation energy of Mn substituting for Mo sites in MoS2 is significantly reduced to overcome the self-purification effect. The substitutional Mn doping is convincingly evidenced by high-angle annular dark-field scanning transmission electron microscopy and X-ray absorption fine spectroscopy characterizations. The Mn-doped MoS2 nanosheets show robust intrinsic ferromagnetic response with a saturation magnetic moment of 0.05 µB Mn−1 at room temperature. The intrinsic ferromagnetism is further confirmed by the reversibility of the magnetic behavior during the cycle of incorporating/removing Li codopants, showing the critical role of Mn 3d electronic states in mediating the magnetic interactions in MoS2 nanosheets.

Original languageEnglish (US)
Article number1701389
JournalSmall
Volume13
Issue number39
DOIs
StatePublished - Oct 18 2017

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (Grant Nos. 11435012, U1632263, and 21533007) and the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (11621063). The authors would like to thank Beijing Synchrotron Radiation Facility (BSRF), Shanghai Synchrotron Radiation Facility (SSRF), and National Synchrotron Radiation Laboratory (NSRL) for the synchrotron beamtime.

Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

  • first-principles calculations
  • Mn-doped MoS nanosheets
  • room-temperature ferromagnetism
  • self-purification effect
  • supercritical hydrothermal reaction

ASJC Scopus subject areas

  • Biotechnology
  • General Chemistry
  • Biomaterials
  • General Materials Science
  • Engineering (miscellaneous)

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