Photopyroelectric detection of organic vapors
نویسندگان
چکیده
The photopyroelectric (PPE) detection of vapors under ambient conditions is demonstrated. A polymer film coated on the transducer is used as sensitive layer. Sorption within this layer binds and concentrates the vapor molecules at the detector surface. Monochromatic IR-radiation selectively excites the sorbed molecules and, therefore, the detected heat is a function of vapor concentration. Preliminary experiments yield a detection limit of 30 ppm methanol vapor.
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تاریخ انتشار 2016