Ultra-Miniature DMMP Gas Sensor Based on Organic Semiconductor Metal Phthalocyanine

Sarin gas, as the most prominent and well-known type of chemical warfare agent, not only poses a threat on the battlefield but also poses a significant danger to civilians in terrorist attacks. This research developed an effective sensor material and device fabrication scheme for Dimethyl Methylphosphonate (DMMP) gas, which is a simulated sarin gas in experiments. We prepared metal phthalocyanine (MPc) derivatives and, by combining with central metal (Al and Co), Hexafluorbisphenol A molecule (6FBPA) and graphene quantum dots (GQDs), formed complexes (AlPc-6FBPA and CoPc-6FBPA) with high response capability to DMMP gas. The response value of the sensor to 50 ppm DMMP gas can reach 14.2% at room temperature, and it has good recovery and repeatability under the premise of laser-assisted recovery. The results provide a new idea for the development of room temperature gas sensors for the detection of chemical warfare agents.