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Published on: December 5, 2015
High-performance sensors based on molybdenum disulfide thin films
Kangho Lee1, Riley Gatensby, Niall McEvoy
1Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) and Advanced Materials and Bioengineering Research (AMBER) Centre, Trinity College Dublin, Dublin 2, Ireland.
Advanced Materials (Deerfield Beach, Fla.)
|September 13, 2013
Summary
Molybdenum disulfide (MoS2) sensors demonstrate high sensitivity to ammonia (NH3) at room temperature. This research highlights the potential of 2D transition metal-dichalcogenides for advanced gas sensing applications.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Sensing
Background:
- Molybdenum disulfide (MoS2) is a 2D transition metal-dichalcogenide with promising electronic properties.
- Gas sensors are crucial for environmental monitoring and industrial safety.
- Developing highly sensitive and selective gas sensors remains a significant challenge.
Purpose of the Study:
- To develop high-performance gas sensors utilizing molybdenum disulfide (MoS2).
- To investigate the sensitivity of MoS2 films to ammonia (NH3) adsorption.
- To evaluate the potential of 2D materials for room-temperature gas sensing.
Main Methods:
- High-quality MoS2 films were synthesized via sulfurization of sputtered molybdenum layers.
- A simple integration scheme was employed for sensor fabrication.
- Electrical conductivity measurements were performed to assess NH3 adsorption.
Main Results:
- The synthesized MoS2 films exhibited n-type semiconducting behavior.
- Electrical conductivity showed high sensitivity to NH3 adsorption.
- A detection sensitivity of 300 parts per billion (ppb) for NH3 was achieved at room temperature.
Conclusions:
- MoS2-based sensors offer excellent performance for NH3 detection.
- The study confirms the high potential of 2D transition metal-dichalcogenides for sensitive gas sensing.
- These findings pave the way for novel 2D material-based sensor technologies.
