Abstract
The temperature-dependent ammonia gas sensing performance of an interesting indium tin oxide (ITO) based device with an underlying Au-nanodot layer (ITO-Au) is studied and demonstrated. The studied ITO-Au device exhibits good ammonia gas sensing performance and widespread ammonia gas concentration regime. The optimal operation temperature of the studied ITO-Au device is 150?C. The studied ITO-Au device exhibits the benefit of improved sensing performance and extremely low ammonia gas concentration detecting ability. For example, under introduced 1000 ppm and 175 ppb NH3/air gases, the studied ITO-Au device demonstrates remarkable sensitivity ratios of 1786% and 98%, respectively, at 150?C. The related transient responses are also studied. The enhanced sensing performance of the studied ITO-Au device is primarily caused by the presented rougher surface which gives to the increased effective adsorption area. Experimentally, the studied ITO-Au device reveals advantages of simple structure, ease of fabrication, high sensing response, extremely low ammonia gas detecting limit, and low temperature operation capability.
| Original language | English |
|---|---|
| Pages (from-to) | B17-B22 |
| Journal | Journal of the Electrochemical Society |
| Volume | 160 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2013 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Materials Chemistry
- Surfaces, Coatings and Films
- Electrochemistry
- Renewable Energy, Sustainability and the Environment
