کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7145524 | 1462070 | 2015 | 40 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characteristics of ZnO nanorods-based ammonia gas sensors with a cross-linked configuration
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Cross-linked ZnO nanorods (NRs)-based ammonia gas sensors have been fabricated and investigated. The influences of interdigitated electrode spacing d and working temperature on ammonia sensing performance are studied. It is found that when the electrode spacing d is reduced, the ammonia sensor response S would be increased due to the configuration transformation of ZnO NRs. The optimal working temperature is about 573 K due to the temperature dependence on reactions of oxygen species. The studied sensor with an electrode spacing d of 2 μm shows a maximum ammonia sensor response S of 81.6 under exposing to a 1000 ppm NH3/air gas at 573 K. Also, a lower detection limit of 10 ppm NH3/air is achieved. The improved ammonia detecting capability could be attributed to the formation of more cross-linked configurations. The adsorption-time (Ïa) and desorption-time (Ïb) constants of the studied sensor with an electrode spacing d of 2 μm, at 573 K, are 74 and 29 s, respectively. Finally, the studied sensor exhibits good gas sensing response and repeatability toward NH3 gas. Thus, the studied sensor with a cross-linked configuration gives a promise for high-performance ammonia sensing applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 221, 31 December 2015, Pages 491-498
Journal: Sensors and Actuators B: Chemical - Volume 221, 31 December 2015, Pages 491-498
نویسندگان
Tai-You Chen, Huey-Ing Chen, Chi-Shiang Hsu, Chien-Chang Huang, Jian-Sheng Wu, Po-Cheng Chou, Wen-Chau Liu,