Inducing High Coercivity in MoS2 Nanosheets by Transition Element Doping

Sohail Ahmed; Xiang Ding; Nina Bao; Pengju Bian; Rongkun Zheng; Yiren Wang; Peter Paul Murmu; John Vedamuthu Kennedy; Rong Liu; Haiming Fan; Kiyonori Suzuki; Jun Ding; Jiabao Yi

doi:10.1021/acs.chemmater.7b02593

Inducing High Coercivity in MoS₂ Nanosheets by Transition Element Doping

Sohail Ahmed, Xiang Ding, Nina Bao, Pengju Bian, Rongkun Zheng, Yiren Wang, Peter Paul Murmu, John Vedamuthu Kennedy, Rong Liu, Haiming Fan, Kiyonori Suzuki, Jun Ding, Jiabao Yi^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

95 Scopus citations

Abstract

MoS₂ nanosheets were doped with vanadium (V) with a variety of concentrations using a hydrothermal method. Raman, X-ray photoelectron spectroscopy, and electron paramagnetic resonance results indicate the effective substitutional doping in MoS₂. Without V doping, oxides such as MoO₂ and MoO₃ have been observed, whereas with 5 at% V doping, the oxide disappeared. Magnetic measurements show that room temperature ferromagnetism has been induced by V doping. Magnetization tends to increase with the increased V doping concentration. A very large coercivity up to 1.87 kOe has been observed in 5 at% vanadium doped MoS₂, which may attribute to a combination effect of localized charge transfer between V and S ions, pinning effect due to the in-between defects, stress induced by doping, and shape anisotropy due to two-dimensional nature of MoS₂ ribbons.

Original language	English
Pages (from-to)	9066-9074
Number of pages	9
Journal	Chemistry of Materials
Volume	29
Issue number	21
DOIs	https://doi.org/10.1021/acs.chemmater.7b02593
State	Published - 14 Nov 2017
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2017 American Chemical Society.

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Materials Chemistry

Access to Document

10.1021/acs.chemmater.7b02593

Cite this

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title = "Inducing High Coercivity in MoS2 Nanosheets by Transition Element Doping",

abstract = "MoS2 nanosheets were doped with vanadium (V) with a variety of concentrations using a hydrothermal method. Raman, X-ray photoelectron spectroscopy, and electron paramagnetic resonance results indicate the effective substitutional doping in MoS2. Without V doping, oxides such as MoO2 and MoO3 have been observed, whereas with 5 at\% V doping, the oxide disappeared. Magnetic measurements show that room temperature ferromagnetism has been induced by V doping. Magnetization tends to increase with the increased V doping concentration. A very large coercivity up to 1.87 kOe has been observed in 5 at\% vanadium doped MoS2, which may attribute to a combination effect of localized charge transfer between V and S ions, pinning effect due to the in-between defects, stress induced by doping, and shape anisotropy due to two-dimensional nature of MoS2 ribbons.",

author = "Sohail Ahmed and Xiang Ding and Nina Bao and Pengju Bian and Rongkun Zheng and Yiren Wang and Murmu, \{Peter Paul\} and Kennedy, \{John Vedamuthu\} and Rong Liu and Haiming Fan and Kiyonori Suzuki and Jun Ding and Jiabao Yi",

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month = nov,

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doi = "10.1021/acs.chemmater.7b02593",

language = "English",

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T1 - Inducing High Coercivity in MoS2 Nanosheets by Transition Element Doping

AU - Ahmed, Sohail

AU - Ding, Xiang

AU - Bao, Nina

AU - Bian, Pengju

AU - Zheng, Rongkun

AU - Wang, Yiren

AU - Murmu, Peter Paul

AU - Kennedy, John Vedamuthu

AU - Liu, Rong

AU - Fan, Haiming

AU - Suzuki, Kiyonori

AU - Ding, Jun

AU - Yi, Jiabao

PY - 2017/11/14

Y1 - 2017/11/14

N2 - MoS2 nanosheets were doped with vanadium (V) with a variety of concentrations using a hydrothermal method. Raman, X-ray photoelectron spectroscopy, and electron paramagnetic resonance results indicate the effective substitutional doping in MoS2. Without V doping, oxides such as MoO2 and MoO3 have been observed, whereas with 5 at% V doping, the oxide disappeared. Magnetic measurements show that room temperature ferromagnetism has been induced by V doping. Magnetization tends to increase with the increased V doping concentration. A very large coercivity up to 1.87 kOe has been observed in 5 at% vanadium doped MoS2, which may attribute to a combination effect of localized charge transfer between V and S ions, pinning effect due to the in-between defects, stress induced by doping, and shape anisotropy due to two-dimensional nature of MoS2 ribbons.

AB - MoS2 nanosheets were doped with vanadium (V) with a variety of concentrations using a hydrothermal method. Raman, X-ray photoelectron spectroscopy, and electron paramagnetic resonance results indicate the effective substitutional doping in MoS2. Without V doping, oxides such as MoO2 and MoO3 have been observed, whereas with 5 at% V doping, the oxide disappeared. Magnetic measurements show that room temperature ferromagnetism has been induced by V doping. Magnetization tends to increase with the increased V doping concentration. A very large coercivity up to 1.87 kOe has been observed in 5 at% vanadium doped MoS2, which may attribute to a combination effect of localized charge transfer between V and S ions, pinning effect due to the in-between defects, stress induced by doping, and shape anisotropy due to two-dimensional nature of MoS2 ribbons.

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