PT5.57 - Synthesis of 2-Dimensional WS2 Nanoflakes with NO2 Selectivity at Room Temperature
- Event
- EUROSENSORS XXXVI
2024-09-01 - 2024-09-04
Debrecen (Hungary) - Band
- Poster
- Chapter
- PT5 - Chemical Sensors
- Author(s)
- S. W. Choi, H. D. Nguyen - Kangwon National University, Gangwon-do (South Korea)
- Pages
- 343 - 344
- DOI
- 10.5162/EUROSENSORSXXXVI/PT5.57
- ISBN
- 978-3-910600-03-4
- Price
- free
Abstract
We have synthesized 2-dimenstional (2D) WS2 nanoflakes utilizing chemical vapor deposition to detect hazardous and harmful gas species at room temperature. The synthesized WS2 nanoflakes were characterized via scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectroscopy. In addition, to verify the detection of hazardous and harmful gases at room temperature, we systematically investigated the gas sensing performances of 2D WS2 nanoflake-based gas sensors using NO2, NH3, C2H5OH, C3H6O, and H2 gases. Although the 2D WS2 nanoflakes showed lower NO2 response than that of a similar exfoliated WS2 nanoflakes, unlike the exfoliated WS2 nanoflakes, the 2D WS2 nanoflakes exhibited good NO2 selectivity. These results indicate that the CVD-grown 2D WS2 nanoflakes can be applicable to sensing material for detecting NO2 at room temperature.