کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
742755 | 894322 | 2012 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Selectivity enhancement using mesoporous silica thin films for single walled carbon nanotube based vapour sensors
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
Vapour sensors based on single walled carbon nanotubes (SWCNT) networks offer a high sensitivity but poor selectivity. Different works were undertaken, with varying degrees of success, to overcome this drawback. In this context, we develop a new selective sensor architecture based on a SWCNT network covered with a mesoporous silica film elaborated by sol–gel process. The topological and chemical characteristics of this sensor are obtained by TEM, SEM, EDX, contact angle and electrical measurements. We demonstrate that highly polarised molecules are stopped by the silica layer while other molecules like NO2 can diffuse easily in the mesoporous silica layer to reach the SWCNT network without increasing the response time.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 163, Issue 1, 1 March 2012, Pages 121–127
Journal: Sensors and Actuators B: Chemical - Volume 163, Issue 1, 1 March 2012, Pages 121–127
نویسندگان
Yann Battie, Olivier Ducloux, Loïc Patout, Philippe Thobois, Annick Loiseau,