کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10410895 | 894532 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A rate equation approach to the gas sensitivity of thin film metal oxide materials
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A rate equation approach to the gas sensitivity of thin film metal oxide materials A rate equation approach to the gas sensitivity of thin film metal oxide materials](/preview/png/10410895.png)
چکیده انگلیسی
Thin film metal oxide materials exhibit a bell-shaped variation of the gas sensitivity with sensor operation temperature. With respect to the temperature TM at which a sensitivity maximum occurs, the distribution of the gas sensitivity is asymmetric exhibiting a relatively steep increase below TM and a more moderate drop-off above TM. In this paper a rate equation approach is described, which successfully reproduces temperature- and gas-concentration dependent sensitivity distributions S(T, cgas) experimentally determined for a number of reducing analyte gas molecules. We show that such distributions are determined by two energetic parameters, which are specific for the special adsorbate/adsorbent system involved. These are (i) the strength of adsorption of neutral analyte gas molecules Eads and (ii) the kinetic barrier Ea that needs to be overcome to induce a surface combustion event involving an adsorbed analyte gas molecule and a surface oxygen ion.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 107, Issue 2, 29 June 2005, Pages 587-599
Journal: Sensors and Actuators B: Chemical - Volume 107, Issue 2, 29 June 2005, Pages 587-599
نویسندگان
S. Ahlers, G. Müller, T. Doll,