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Title: Synthesis, characterization of WS{sub 2} nanostructures by vapor phase deposition

Ultrathin two-dimensional WS{sub 2} nanostructures with various morphologies have been prepared on SiO{sub 2}/Si (300 nm) and sapphire substrates by vapor phase deposition method. Simultaneously, tungsten nanostructures have also been obtained during the growth process. The nanostructures and morphologies of as-prepared products were systematically characterized by employing atomic force microscopy, Raman spectroscopy as well as scanning electron spectroscopy. The electrostatic properties of WS{sub 2} nanostructures were investigated exhibiting uniform surface potential and charge distributions. We have also detected the photoluminescence properties of WS{sub 2} nanostructures, which are dependent on the thickness and nanostructures of synthesized WS{sub 2}. These results suggest that the optoelectronic properties of WS{sub 2} nanostructures can be effectively tuned by quantum confinement effect and nanostructures.
Authors:
; ; ; ;  [1] ;  [2] ;  [1] ;  [2] ;  [2]
  1. Hunan Key Laboratory of Micro-Nano Energy Materials and Devices, Xiangtan University, Hunan 411105 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22413095
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 6; Other Information: (c) 2015 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; ATOMIC FORCE MICROSCOPY; CHARGE DISTRIBUTION; DEPOSITION; ELECTRON SPECTROSCOPY; INTERFACES; MORPHOLOGY; NANOSTRUCTURES; PHOTOLUMINESCENCE; RAMAN SPECTROSCOPY; SAPPHIRE; SILICON; SILICON OXIDES; SUBSTRATES; SURFACE POTENTIAL; TUNGSTEN; TUNGSTEN SULFIDES; TWO-DIMENSIONAL SYSTEMS; VAPORS