کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7145732 | 1462074 | 2015 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Light-activated resistive ozone sensing at room temperature utilizing nanoporous In2O3 particles: Influence of particle size
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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: Light-activated resistive ozone sensing at room temperature utilizing nanoporous In2O3 particles: Influence of particle size Light-activated resistive ozone sensing at room temperature utilizing nanoporous In2O3 particles: Influence of particle size](/preview/png/7145732.png)
چکیده انگلیسی
Ordered mesoporous In2O3 particles of variable size synthesized by the nanocasting method are used for preparation of resistive gas-sensing layers. Light activation by a LED (blue light, 460Â nm) permits room-temperature ozone sensing. Apart from differences in base-line resistance in sensing layers containing small (diameter approx. 170Â nm) or large particles (approx. 870Â nm), differences in the response amplitude and response time constant are also observed. Signal stabilization is achieved faster for small particles. In addition, sensors show a particle size-dependent reaction threshold for low ozone concentration. Larger particles show negligible response to 50Â ppb ozone whereas a significant response is observed for the small-particle sensors. A simple model based on geometrical properties and formation of depletion layers explaining the observed behavior is presented.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 217, 1 October 2015, Pages 181-185
Journal: Sensors and Actuators B: Chemical - Volume 217, 1 October 2015, Pages 181-185
نویسندگان
Dominik Klaus, Danielle Klawinski, Sabrina Amrehn, Michael Tiemann, Thorsten Wagner,