Inducing High Coercivity in MoS2 Nanosheets by Transition Element Doping
Inducing High Coercivity in MoS2 Nanosheets by Transition Element Doping
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DOI：
10.1021/acs.chemmater.7b02593
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发表时间：
2017-11-14
影响因子：
8.6
通讯作者：
Yi, Jiabao
中科院分区：
文献类型：
--
作者：
Ahmed, Sohail;Ding, Xiang;Yi, Jiabao
采用水热法对二硫化钼纳米片进行了不同浓度的钒掺杂。拉曼光谱、x射线光电子能谱和电子顺磁共振结果表明，MoS2中存在有效的取代掺杂。在没有V掺杂的情况下，可以观察到MoO2和MoO3等氧化物，而在5% V掺杂时，氧化物消失。磁性测量表明，V掺杂在室温下产生了铁磁性。磁化强度随V掺杂浓度的增加而增加。S at%钒掺杂的MoS2的矫顽力高达1.87 kOe，这可能是由于V和S离子之间的局部电荷转移、中间缺陷引起的钉住效应、掺杂引起的应力以及MoS2带的二维性质造成的形状各向异性的共同作用。
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 S 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.