کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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744004 | 1462123 | 2011 | 9 صفحه PDF | دانلود رایگان |
Nanocrystalline copper-doped zirconia (CDZ; Cu:Zr = 16:84) thin films have been synthesized on long-period fiber gratings (CDZ-LPFG) by a polymeric precursor method. The CDZ-LPFG device was demonstrated to have high sensitivity and good reversibility for low-concentration CO sensing at high temperatures. The CDZ-LPFG responds with red shifts of its resonant wavelength (λR) to CO-containing gases and the λR shift reverses when it is exposed to air. The optical response of the CDZ-LPFG to CO is due primarily to the CDZ refractive index variations resulted from the reversible redox reactions (i.e. Cu2+ ⇔ Cu+) in reducing and oxidizing atmospheres. The magnitude of the λR shift exhibited a strong dependence on CO concentration in a range from 0 to 1000 ppm that is potentially useful for quantitative measurement.
Journal: Sensors and Actuators B: Chemical - Volume 160, Issue 1, 15 December 2011, Pages 533–541