Hydrogen-bond acidic organic compound-sensitized ionic gel for dimethyl methylphosphonate detection

A Nanoporous Polymer Modified with Hexafluoroisopropanol to Detect Dimethyl Methylphosphonate

“…A comparison of our gas sensors with previous studies is presented in Table 2 . Among them, HFIP–ionic gel [ 30 ] and HFIP–CNT [ 16 ] have also been reported as sensitive materials by our team. In comparison, the HFIP porous material exhibits notable advantages in terms of its simple preparation process.…”

Highly Selective Ionic Gel-Based Gas Sensor for Halogenated Volatile Organic Compound Detection: Effect of Dipole–Dipole Interaction

“…Considering that the SAW device is a mass-sensitive device, excessive sensitive material coated on the sensing area will cause device failure. To avoid this, a method based on in situ photopolymerization and capillary force is used to prepare a thin ionic gel film on the SAW device . First, the SAW device is treated with 140 W O 2 plasma for 90 s to enhance surface hydrophilicity.…”

“…Then, a surface acoustic wave (SAW) gas sensor is fabricated with the EMIM-TFSI/PEGDA ionic gel film as the sensitive layer. Its sensing mechanism is mainly based on mass loading: − the absorption of gas molecules in the sensitive layer will change the phase or center frequency of the SAW gas sensor, which is then converted into a voltage output by a signal conversion circuit. In order to verify that the presence of halogen atoms is crucial for the selectivity of the IL toward X-VOCs, three groups of gas samples, each containing one X-VOC sample and one structurally similar nonhalogenated VOC sample, are selected for the comparative test.…”