کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7144464 | 1462064 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ultrasensitive NO2 gas sensors using tungsten oxide nanowires with multiple junctions self-assembled on discrete catalyst islands via on-chip fabrication
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Ultrasensitive NO2 gas sensors using tungsten oxide nanowires with multiple junctions self-assembled on discrete catalyst islands via on-chip fabrication Ultrasensitive NO2 gas sensors using tungsten oxide nanowires with multiple junctions self-assembled on discrete catalyst islands via on-chip fabrication](/preview/png/7144464.png)
چکیده انگلیسی
An effective fabrication of networked nanowire sensors with multiple junctions, which were obtained by selectively growing tungsten oxide nanowires directly on the arrays of discrete catalyst islands, was demonstrated for highly sensitive NO2 gas sensors. Junction density was controlled by altering growth time for superior NO2 gas response. The optimum sensor exhibited remarkably high response (Rg/Ra) to 10 ppm NO2 (Rg/Ra â¼Â 144.3), negligible cross-responses to 100 ppm CO, H2, and NH3 (Rg/Ra â¼Â 1.3-1.7), and ultralow detection limit (â¼0.33 ppb) at 250 °C. In addition, the sensor exhibited good reversibility for up to 15 cycles of air-to-gas switching under sensing at relatively high temperatures of up to 350 °C. The methodology illustrated in the present work aims to overcome the disadvantages of nanowire sensors grown on an ordinary continuous catalyst layer and to make these sensors suitable for large-scale fabrication via microelectronic technology.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 227, May 2016, Pages 198-203
Journal: Sensors and Actuators B: Chemical - Volume 227, May 2016, Pages 198-203
نویسندگان
Phung Thi Hong Van, Do Duc Dai, Nguyen Van Duy, Nguyen Duc Hoa, Nguyen Van Hieu,