[ China Instrument Network Instrument Development ] Recently, Anguang Institute of Research and Development, Gao Xiaoming's research team, Liu Wei, has made new breakthroughs in the research of cantilever-type thin film photoacoustic spectroscopy. The related research work is "A novel photoacoustic spectroscopy gas sensor using a low cost polyvinylidene Fluoride film is published online in the journal Sensors and Actuators B: Chemical (Zone 1, IF: 5.6).
Photoacoustic spectroscopy has high sensitivity, low frequency dependence, and simple structure. The research heat has increased year by year. In recent years, it has reported various kinds of cantilever photoacoustic spectroscopy, quartz tuning fork resonance enhanced photoacoustic spectroscopy, multi-channel photoacoustic spectroscopy and so on. New technology for photoacoustic spectroscopy. Among various photoacoustic spectroscopy techniques, cantilever photoacoustic spectroscopy is one of the most sensitive techniques, but it requires optical interferometer to measure cantilever vibration, and the structure is complicated.
Recently, Liu Wei, associate researcher, used the new piezoelectric film material (PVDF) for the first time in cantilever photoacoustic spectroscopy. The film vibration excited by photoacoustic signals is directly detected by the electrical signal generated by its piezoelectric characteristics, eliminating complex optical interference. The instrument is expected to greatly simplify the structure of high-sensitivity cantilever photoacoustic spectroscopy. The feasibility of this technique was verified by measuring atmospheric H2O molecules.
The beneficial effects of the piezoelectric film-based cantilever photoacoustic spectroscopy include: first, reducing the complexity and cost of the cantilever photoacoustic spectroscopy; second, the extremely flexible flexibility of the piezoelectric film will greatly enhance the environment of the cantilever photoacoustic spectroscopy. Adaptability; Third, the corrosion resistance of the piezoelectric film makes it suitable for measurement applications of highly corrosive samples (O3, NO2, NH3, etc.).
The research work was supported by the National Natural Science Foundation of China, the Youth Fund, and the Chinese Academy of Sciences Youth Innovation Promotion Association.
(Original title: Anguang made a new breakthrough in the research of cantilever film photoacoustic spectroscopy technology)
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