TY - JOUR
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
Y1 - 2017
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.
KW - charge transfer
KW - electron paramagnetic resonance
KW - molybdenum compounds
KW - x, ray photoelectron spectroscopy
UR - http://handle.westernsydney.edu.au:8081/1959.7/uws:44830
U2 - 10.1021/acs.chemmater.7b02593
DO - 10.1021/acs.chemmater.7b02593
M3 - Article
SN - 1520-5002
SN - 0897-4756
VL - 29
SP - 9066
EP - 9074
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 21
ER -