NANOCOMPOSITE COATED SURFACE ACOUSTIC WAVE SENSOR FOR CHEMICAL WARFARE AGENT DETECTIONS

作者：Viespe Cristian^*; Grigoriu Constantin; Toader Constantin; Popescu Ion M

来源：Polytechnical University of Bucharest Scientific Bulletin Series A- Applied Mathematics and Physics, 2011, 73(1): 195-200.

• surface acoustic wave
• nanoparticles
• chemical warfare agents

The comparative study of surface acoustic wave sensors (SAWS) coated with sensitive layer of polymer and nanoparticles embedded in polymer was made. The sensors were designed for chemical warfare agent detection. SiO(2), TiN, TiO(2) and Co(3)N nanoparticles embedded in polyethylenimine (PEI) were used as sensitive material. The sensors were "delay line" type with a center frequency of 69.4 MHz, fabricated on ST cut quartz substrate.
The sensitivity and limit of detection was reported for three chemical agents: chloropicrin (CCl(3)NO(2),), lewisite (C(2)H(2)AsCl(3)) and soman (C(7)H(15)FPO(2)). The study demonstrated that in comparison with plain polymer sensitive layer, the sensor with nanocomposite had an improved limit detection, in some case three times better.

• 出版日期2011