skip to main content

Title: Composition dependent Fermi level shifting of Au decorated MoS{sub 2} nanosheets

In the present work, shifting of Fermi level of MoS{sub 2} nanosheets due to decoration of Au nanoparticles (Au NPs) is reported. Au NPs are grown on MoS{sub 2} nanosheets by chemical reduction method. The structural analysis of pristine MoS{sub 2} and Au NPs decorated MoS{sub 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{sub 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{sub 2} is found to be 4.994‚ÄČeV, and it increases linearly for Au-MoS{sub 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{sub 2} towards valence band due to decoration of Au NPs.
Authors:
; ;  [1] ;  [2]
  1. School of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067 (India)
  2. Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067 (India)
Publication Date:
OSTI Identifier:
22489254
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 1; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; FERMI LEVEL; MOLYBDENUM SULFIDES; NANOPARTICLES; NANOSTRUCTURES; TRANSMISSION ELECTRON MICROSCOPY; VALENCE; WORK FUNCTIONS; X-RAY DIFFRACTION