Publication Date:
2016-01-06
Description:
In the present work, shifting of Fermi level of MoS 2 nanosheets due to decoration of Au nanoparticles (Au NPs) is reported. Au NPs are grown on MoS 2 nanosheets by chemical reduction method. The structural analysis of pristine MoS 2 and Au NPs decorated MoS 2 has been done using X-ray diffraction and transmission electron microscopy. The effect of Au NPs decoration on the Fermi energy level of MoS 2 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 MoS 2 is found to be 4.994 eV, and it increases linearly for Au-MoS 2 with increasing concentration of Au NPs. The gradual increase in the work function values indicate a systematic shifting of Fermi energy level of MoS 2 towards valence band due to decoration of Au NPs.
Print ISSN:
0003-6951
Electronic ISSN:
1077-3118
Topics:
Physics
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