PVDF coated quartz crystal microbalance sensor for DMMP vapor detection
- 作者：Zhihua Ying ; Yadong Jiang ; Xiaosong Du ; Guangzhong Xie ; Junsheng Yu ; Hua Wang
- 关键词：QCM sensor ; PVDF ; DMMP ; Humidity ; Temperature
- 刊名：Sensors and Actuators B ; Chemical
- 出版年：2007
- 期刊代码：161_09254005
- 类别：et
- 出版时间：16 July 2007
- 卷：125
- 期：1
- 页码：167-172
- 文件大小：306 K
摘要
A quartz crystal microbalance (QCM) modified with poly(vinylidene fluoride) (PVDF) was fabricated and used for detection of dimethyl methylphosphonate (DMMP) vapor, a simulant of nerve agents using a drop-coating method. Measurements were based on the frequency shifts due to the adsorption of DMMP vapor on the surface of the modified electrodes. It was found that frequency shifts were linear to the concentrations of analyte in the range of 5–60 ppm with a correlation coefficient of above 0.997. The influences of temperature and humidity on the sensors were also examined. Results showed that the sensitivity to DMMP vapor was almost identical in various humidity circumstances, and the sensitivity was higher in a lower temperature range.