Triple Valve Group,Triple Valve Group For Mechanical Engineering,Mechanical Engineering Valve Group,Control Circuit Application Triple Valve Group Huai'an Sur Hydraulic Technology Co., Ltd , http://www.surhydraulic.com
[China Instrument Network Instrument Development] Recently, a research team led by Gao Xiaoming and Liu Wei from the Anguang Institute of Research and Development has achieved significant progress in the field of cantilever-type thin-film photoacoustic spectroscopy. Their groundbreaking work, titled "A novel photoacoustic spectroscopy gas sensor using a low-cost polyvinylidene fluoride film," was recently published online in *Sensors and Actuators B: Chemical* (a top-tier journal with an impact factor of 5.6).
This innovative approach introduces a new method for detecting gases using a piezoelectric PVDF (polyvinylidene fluoride) film, which simplifies the traditional setup of photoacoustic spectroscopy. Unlike conventional techniques that rely on complex optical interferometers to measure the vibration of a cantilever, this system directly detects the mechanical motion caused by photoacoustic signals through the piezoelectric effect, converting it into an electrical signal. This not only reduces the system's complexity but also lowers its cost significantly.
Photoacoustic spectroscopy is known for its high sensitivity, minimal frequency dependence, and straightforward design, making it a popular choice in analytical chemistry. Over the years, researchers have developed various advanced techniques, such as cantilever-based systems, quartz tuning fork resonance-enhanced methods, and multi-channel configurations. Among these, the cantilever-based approach is particularly sensitive, yet it often requires intricate optical setups.
Liu Wei and his team’s use of PVDF marks a major breakthrough. The flexible and durable nature of the material allows for better adaptability in different environments. Additionally, PVDF exhibits strong resistance to corrosion, making it ideal for analyzing harsh chemical samples like ozone (O₃), nitrogen dioxide (NO₂), and ammonia (NH₃). The technique was successfully tested by detecting water vapor (H₂O) in the atmosphere, confirming its practical potential.
The development has promising implications for future gas sensing applications, especially in environmental monitoring, industrial safety, and medical diagnostics. It opens up new possibilities for creating compact, cost-effective, and robust photoacoustic sensors.
This research 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)