Composition dependent Fermi level shifting of Au decorated MoS2 nanosheets

被引:38
|
作者
Shakya, Jyoti [1 ]
Patel, Arun Singh [1 ]
Singh, Fouran [2 ]
Mohanty, Tanuja [1 ]
机构
[1] Jawaharlal Nehru Univ, Sch Phys Sci, New Delhi 110067, India
[2] Inter Univ, Accelerator Ctr, Aruna Asaf Ali Marg, New Delhi 110067, India
关键词
ACTIVE EDGE SITES; WORK FUNCTION; MONOLAYER; PHOTOLUMINESCENCE; EVOLUTION;
D O I
10.1063/1.4939204
中图分类号
O59 [应用物理学];
学科分类号
摘要
In the present work, shifting of Fermi level of MoS2 nanosheets due to decoration of Au nanoparticles (Au NPs) is reported. Au NPs are grown on MoS2 nanosheets by chemical reduction method. The structural analysis of pristine MoS2 and Au NPs decorated MoS2 has been done using X-ray diffraction and transmission electron microscopy. The effect of Au NPs decoration on the Fermi energy level of MoS2 nanosheets have been monitored by scanning Kelvin probe microscopy, which measures the work function in terms of contact potential difference. The work function of pristine MoS2 is found to be 4.994 eV, and it increases linearly for Au-MoS2 with increasing concentration of Au NPs. The gradual increase in the work function values indicate a systematic shifting of Fermi energy level of MoS2 towards valence band due to decoration of Au NPs. (C) 2016 AIP Publishing LLC.
引用
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页数:4
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