Room-temperature ferromagnetism in Co doped MoS2 sheets

被引：82
作者：
Xiang, ZhongCheng [1 ]
Zhang, Zhong [1 ]
Xu, XiJin [1 ]
Zhang, Qin [2 ]
Wang, QingBao [1 ]
Yuan, Chengwu [3 ]
机构：
[1] Univ Jinan, Sch Phys & Technol, Jinan 250022, Peoples R China
[2] Shandong Jiaotong Univ, Sch Sci, Jinan 250357, Peoples R China
[3] BP Amer, Houston, TX 77079 USA
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2015年 / 17卷 / 24期
基金：
中国国家自然科学基金;
关键词：
MONOLAYER; PHOTOLUMINESCENCE; PERFORMANCE; SEGREGATION; LAYERS;
D O I：
10.1039/c5cp01509j
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Via the hydrothermal method, we synthesized MoS2 nanosheets with varying Co dopant concentrations of 0%, 3%, 7%, using cobaltous acetate as a promoter, and marked as A, B, and C, respectively. We found that the thickness and flatness of the nanosheets increased with the increase of the Co dopant concentrations. Meanwhile, the BET surface area of samples (A, B, and C) decreased with the increase of the Co dopant concentrations. Optical absorption spectroscopy showed that, compared to sample A, the A(1) and B-1 excitons of samples B and C were 10 and 23 meV redshifted, respectively. Then, we performed magnetization measurement to investigate the effect of Co-doping; the unique result implied that the values of the magnetic moment decreased with the increase of the Co dopant concentrations. We performed DFT computations to address the above magnetic result. The computational result indicated that the value of the magnetic moment decreased with the increase of the Co dopant concentrations, which is in agreement with the results of the experiments described above.
引用
收藏
页码：15822 / 15828
页数：7
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