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Title: Graphene‐Assisted Antioxidation of Tungsten Disulfide Monolayers: Substrate and Electric‐Field Effect

Journal Article · · Advanced Materials
 [1];  [1];  [2];  [1];  [2];  [2];  [1]
  1. Department of Mechanical Engineering Stevens Institute of Technology Hoboken NJ 07030 USA
  2. Department of Mechanical Engineering Columbia University New York NY 10027 USA

Transition metal dichalcogenides (TMDs) have emerged as promising materials to complement graphene for advanced optoelectronics. However, irreversible degradation of chemical vapor deposition‐grown monolayer TMDs via oxidation under ambient conditions limits applications of TMD‐based devices. Here, the growth of oxidation‐resistant tungsten disulfide (WS 2 ) monolayers on graphene is demonstrated, and the mechanism of oxidation of WS 2 on SiO 2 , graphene/SiO 2 , and on graphene suspended in air is elucidated. While WS 2 on a SiO 2 substrate begins oxidation within weeks, epitaxially grown WS 2 on suspended graphene does not show any sign of oxidation, attributed to the screening effect of surface electric field caused by the substrate. The control of a local oxidation of WS 2 on a SiO 2 substrate by a local electric field created using an atomic force microscope tip is also demonstrated.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐SC0012704
OSTI ID:
1401758
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Vol. 29 Journal Issue: 18; ISSN 0935-9648
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

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