AgNWs@SnO2/CuO nanocomposites for ultra-sensitive SO2 sensing based on surface acoustic wave with frequency-resistance dual-signal display

Sensitive Materials Used in Surface Acoustic Wave Gas Sensors for Detecting Sulfur-Containing Compounds

“…Up to now, there have been few reports on the detection of SO 2 by SAW sensors. In addition to the polymers discussed above, many other sensitive materials have also been used to detect SO 2 , such as metal oxides [ 59 ], metal sulfides [ 60 ], and small organic molecules [ 61 , 62 ].…”

“…Up to now, there have been few reports on the detection of SO2 by SAW sensors. In addition to the polymers discussed above, many other sensitive materials have also been used to detect SO2, such as metal oxides [59], metal sulfides [60], and small organic molecules [61,62]. In 2013, Ben et al [58] created new polyurethane imides (PUIs) with Lewis base properties by synthesizing them with N-methyldiethanolamine (MDEA), N-tert-butyldiethanolamine (tBu-DEA), N-phenyldiethanolamine (Ph-DEA), and 1, 4-diethanolpiperazine-diol (Piperazinediol) as functional monomers.…”

Integrated Passive Device-Based Gas Sensor Combined with PANI/SnO2 Composites for Ammonia Detection

“…It easily establishes communication with external devices and also has abroad application prospects. The principles of these different types of gas sensors tend to be the same, capturing and converting the changes of physical or chemical properties of the gas sensing material under exposure to the target gas into parameters that can be detected by the selected measurement methods; these changes can be the optical band gap of V 2 O 2 nanoparticles in the optical gas sensor, 1 the volt−ampere characteristic of PAA/ AuNPs-based composites in the electrochemical gas sensor, 2 or the resistance property of the AgNWs@SnO 2 nanocomposites in the SAW sensor, 3 which are, respectively, converted into Raman spectroscopy, voltammetry characteristics, and propagation frequency, which can be observed in convenience by other measuring instruments. Many of these types of gas sensors have been successfully developed and have practical worthiness at present.…”