| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 741187 | Sensors and Actuators B: Chemical | 2008 | 5 Pages |
Abstract
A new polysiloxane material, polymethyl[3-(2-hydroxy)phenyl] siloxane (PMPS), was synthesized. The PMPS is a linear polysiloxane polymer functionalized with o-allyl phenol group. The chemoselective polymer was spin-coated on a 434 MHz surface acoustic wave (SAW) device for detection of dimethyl methylphosphonate (DMMP) vapor ranging from 5 to 40 ppm. It was found that the frequency shifts were linear to the vapor concentrations with a high sensitivity of 3 kHz/ppm. Fast response of 30 s and good reproducibility were achieved as well. The influence of humidity on the sensor response was also examined. The results showed that the sensitivity decreased about 1/2 when tested in 70% RH wet air than in dry nitrogen.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Xiaosong Du, Zhihua Ying, Yadong Jiang, Zhongxiang Liu, Taojun Yang, Guangzhong Xie,