Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10146694 | Sensors and Actuators B: Chemical | 2018 | 16 Pages |
Abstract
A proof-of-concept gas sensor based on innovative photoacoustic spectrophone was introduced for purpose of developing a low cost and simple configuration photoacoustic spectroscopy gas sensor and demonstrated, in which the photoacoustic signal was detected with a low cost polyvinylidene fluoride (PVDF) film being used as transducer, instead of using conventional microphone or quartz tuning fork. In such a PVDF-based photoacoustic spectroscopy (PVDF-PAS) approach, the PVDF film plays a role both as a cantilever used in cantilever-enhanced photoacoustic spectroscopy and as a piezoelectric quartz tuning fork used in quartz-enhanced photo-acoustic spectroscopy. Feasibility of the introduced PVDF-PAS for trace gas sensing was demonstrated by measuring H2O vapor with a minimum detection limit of 40 ppmv using a lock-in time constant of 30âms, this corresponding to a normalized noise equivalent absorption coefficient (NNEA) of 2.4âÃâ10â7âcm-1W/Hz1/2. The use of polyvinylidene fluoride film as transducer for photoacoustic signal sensing offers good flexibility, water resistance, chemical stability and low cost for applications under harsh or/and specific environmental conditions.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Kun Liu, Yuan Cao, Guishi Wang, Weijun Zhang, Weidong Chen, Xiaoming Gao,