期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 4, 页码 2952-2959出版社
AMER CHEMICAL SOC
DOI: 10.1021/am508535x
关键词
MoS2; CVD synthesis; gas sensor; photodetector; bifunctional sensor
资金
- Fundamental Research Program of the Korean Institute of Materials Science (KIMS) [PNK3770]
- Basic Science Research Program of the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [NRF-2014R1A1A1006214, NRF-2014R1A1A1036139]
- National Research Council of Science & Technology (NST), Republic of Korea [PNK3770] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Two-dimensional (2D) molybdenum disulfide (MoS2) atomic layers have a strong potential to be adopted for 2D electronic components due to extraordinary and novel properties not available in their bulk foams. Unique properties of the MoS2, including quasi-2D crystallinity, ultrahigh surface-to-volume, and a high absorption coefficient, have enabled high-performance sensor applications. However, implementation of only a single-functional sensor presents a limitation for various advanced multifunctional sensor applications within a single device. Here, we demonstrate the charge-transfer-based sensitive (detection of 120 ppb of NO2) and selective gas-sensing capability of the chemical vapor deposition synthesized MoS2 and good photosensing characteristics, including moderate photoresponsivity (similar to 71 mA/W), reliable photoresponse, and rapid photoswitching (<500 ms). A bifunctional sensor within a single MoS2 device to detect photons and gas molecules in sequence is finally demonstrated, paving a way toward a versatile sensing platform for a futuristic multifunctional sensor.
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