| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7145497 | Sensors and Actuators B: Chemical | 2016 | 21 Pages |
Abstract
We report a simple solution-process route to realize ammonia (NH3) gas sensor based on graphene quantum dots (GQDs). Transmission electron microscopy analysis confirmed that the 8-10Â nm GQDs were formed from multi-walled carbon nanotubes by using ultrasonication treatment. The as-fabricated gas sensor showed promising selectivity response when expose to NH3 ambient at room temperature. It is indicated that by adjusting the pH value of the aqueous GQDs in acidic and neutral, two types of gas sensors with contrary current responses could be obtained, which might be resulted from quantum confinement, edge effects and presence of functional groups on GQDs.
Related Topics
Physical Sciences and Engineering
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Authors
Wei Chen, Fushan Li, Poh Choon Ooi, Yun Ye, Tae Whan Kim, Tailiang Guo,