کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10410934 | 894532 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ethanol vapor detection in aqueous environments using micro-capacitors and dielectric polymers
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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 technique for the measurement of ethanol concentrations in aqueous mixtures is reported, in which a permeable membrane is used to transport ethanol vapors to a microelectromechanical (MEMS) chemi-capacitor array. The fixed plate micro-capacitors were filled with a polymeric dielectric material, siloxanefluoro alcohol (SXFA), whose dielectric constant increased upon absorption of ethanol vapor. Measurements of the mixture's liquid-phase concentration were made in the vapor-phase by sampling the saturated vapors through a hydrophobic, vapor permeable nanopore filter. The performance of these sensors was characterized over a range of ethanol/water mixture concentrations and flow cell temperatures. The limit of detection (LOD) for ethanol in water using the capacitive micro-sensors in the present arrangement was found to be 40Â ppm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 107, Issue 2, 29 June 2005, Pages 892-903
Journal: Sensors and Actuators B: Chemical - Volume 107, Issue 2, 29 June 2005, Pages 892-903
نویسندگان
Dennis L. McCorkle, Robert J. Warmack, Sanjay V. Patel, Todd Mlsna, Scott R. Hunter, Thomas L. Ferrell,