کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7145494 | 1462071 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Novel scheme to improve SnO2/SAW sensor performance for NO2 gas by detuning the sensor oscillator frequency
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
A new method has been devised for obtaining fast NO2 gas sensing characteristics by using detuned SnO2/SAW sensor oscillator. The deposited SnO2 thin films were polycrystalline showing XRD reflections corresponding to (1 0 1) and (2 1 1) planes of rutile structure. The frequency of the sensor remained tuned for SnO2 layer of small thickness (< 90 nm), and sensing response was moderate (< 140 kHz) with relatively slow response time and recovery time. However with increase in thickness (â¥Â 90 nm), the frequency of SAW sensor detuned resulting in enhanced sensing response (â¥Â 16 MHz) along with fast response time and recovery time. Independent experiments confirmed the change in elasticity of the sensing layer as the dominant sensing mechanism for SnO2/SAW sensor towards NO2 gas.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 220, 1 December 2015, Pages 154-161
Journal: Sensors and Actuators B: Chemical - Volume 220, 1 December 2015, Pages 154-161
نویسندگان
V. Bhasker Raj, A.T. Nimal, Monika Tomar, M.U. Sharma, Vinay Gupta,