| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Recent Advances in Functional Materials and 2D/3D Processing for Sensors and Electronic Applications
|
| Presentation Title |
Highly Sensitive and Selective Room Temperature Ammonia Sensor |
| Author(s) |
Shivani Sharma, Rajan Saini, Sandeep Sharma |
| On-Site Speaker (Planned) |
Shivani Sharma |
| Abstract Scope |
Recently two-dimensional materials such as WS2 and MoS2 have attracted great attention due to their fascinating physical properties. Due to their 2-D character these materials possess high surface-to-volume ratio, important for sensor devices. The optical and electronics properties of these layered materials have been extensively explored, but gas sensing behaviour of these materials still remains unexplored. In nanostructure form, WS2 behaves like a p-type material and a strong interaction is expected with electron donor species such as ammonia.
In view of these aspects, we have investigated the sensing response of WS2 based sensors to ammonia, ethanol, acetone, benzene etc. The sensor is highly sensitive and selective to ammonia at room temperature and has detection limit as low as 5 ppm (sensing response 120 %), much below the prescribed occupation exposure limit of NH3 gas. Present work justifies the potential of 2-D nanostructures as high-performance gas sensors. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |