Porous CoFe2O4 nanorods: VOC gas-sensing characteristics and DFT calculation

Theoretical Investigation of TiSiO4 Monolayer Membranes for Highly Selective H2S Detection from Hazardous Gas Mixtures

“…Metal oxide semiconductor gas-sensing materials such as Fe 2 O 3 , SnO 2 , In 2 O 3 , and TiO 2 are widely used in actual equipment. − As one of the most promising metal oxide semiconductor materials, TiO 2 was studied as a sensing material for various gases including H 2 S, CO, H 2 , alcohols, SO 2 , NO, and O 2 . , Several methods were developed to further improve the gas sensitivity of TiO 2 ; acquiring a large specific surface area could increase the contact surface of gas molecules and significantly reduce response time accordingly. − Monolithic porous materials with ultralow densities attract high interests because of their promising prospects as adsorption materials. − Compared to common 2D materials, the unique structure of the TiSiO 4 aerogel generally presents higher specific area, higher porosity, and lower density, which will increase the contact area of gases and lead to shorter response time. , Recently, a three-dimensional TiSiO 4 monolayer membrane was proposed and showed excellent sensing performance toward H 2 S gas; however, the sensing mechanism between H 2 S and the TiSiO 4 membrane at nanoscale is still not clear, which is crucial for designing and developing novel TiSiO 4 gas sensors.…”

Influence of Volatile Organic Compound Adsorption on the Characteristics of Organic Field-Effect Transistors and Rules for Gas-Sensing Measurements

“…Most VOCs are toxic, carcinogenic, and combustible, seriously threatening human health and safety. − Therefore, the detection of VOCs in the atmosphere is essential. Organic semiconductors (OS) have recently received increasing attention in gas sensors because of their potential applications in flexible and wearable electronics. − In addition, organic semiconductors are genius for VOC gas-sensing applications because the precise organic synthesis can tailor functional groups for the specific binding of VOC analytes, leading to the prospect of simplifying gas sensors with enhanced responsivity and selectivity …”

“…A multiparametric analysis of OFET sensors involves current, field-effect mobility, and threshold voltage, which could determine the fingerprint information on VOC analytes, thereby achieving the recognition of trace VOCs with a multiparametric algorithm . Besides, OFET sensors inherit the advantage of transistors in signal amplification via gate voltage tuning, in which the signal transduction of VOC analytes and the signal amplification can be simultaneously realized by one device, thus enhancing the gas sensing by orders of magnitude . In addition, OFET sensors are compatible with electronic systems such as COMS circuits, Internet of Things chips, and large-area manufacturing, giving diversiform scalability for designing sensors .…”

Advancing an AIE dipyridyl derivative-based self-assembly system as a robust probe with enhanced fluorescence by metal ions for sensing multiple solvents

“…[22][23][24][25] However, some sensing materials lack diversity and only detect one type of solvent, or the preparation processes of these sensor materials are tedious and time-consuming, which are not suitable for practical applications. 26,27 Therefore, a current challenge is the fabrication of high-performance sensors with easy preparation processes and responses to multiple kinds of polar solvents.…”