Chemical Sensing of 2D Graphene/MoS2 Heterostructure device
Top Cited Papers
- 22 July 2015
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 7 (30), 16775-16780
- https://doi.org/10.1021/acsami.5b04541
Abstract
We report the production of a two-dimensional (2D) heterostructured gas sensor. The gas-sensing characteristics of exfoliated molybdenum disulfide (MoS2) connected to interdigitated metal electrodes were investigated. The MoS2 flake-based sensor detected a NO2 concentration as low as 1.2 ppm and exhibited excellent gas-sensing stability. Instead of metal electrodes, patterned graphene was used for charge collection in the MoS2-based sensing devices. An equation based on variable resistance terms was used to describe the sensing mechanism of the graphene/MoS2 device. Furthermore, the gas response characteristics of the heterostructured device on a flexible substrate were retained without serious performance degradation, even under mechanical deformation. This novel sensing structure based on a 2D heterostructure promises to provide a simple route to an essential sensing platform for wearable electronics.Keywords
Funding Information
- National Research Foundation of Korea (NRF-2014R1A1A1006214, NRF-2014R1A1A1036139)
- Korean Institute of Materials Science (PNK4210)
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