3D self-assembled indium sulfide nanoreactor for in-situ surface covalent functionalization: Towards high-performance room-temperature NO2 sensing

二维原子-分子异质结的制备及其类脑器件应用

“…(b) 参考NO 2 分子LUMO和HOMO位置的In 2 S 3 -100的能带图. (c) 不同浓度NO 2 气体暴露时In 2 S 3 -100传感器对应的 电阻 [202] . (d) 不同温度下处理后PhSeBr-NG的狄拉克点电压变化及相应的电子和空穴迁移率 [204] (网络版彩图) 靠的多种2D材料主体尚为实现规模化生产 [30] , 缺乏高 效低成本的可控制备方式; (4) 共价修饰通常依靠于自 下而上的合成路线, 可能涉及多种有毒试剂的使用 [32] ;…”

Room-Temperature Optoelectronic NO2 Sensing Using Two-Dimensional Gallium Oxyselenides

“…The monolayer MXene sheet exhibits a response to 50 ppm of NH 3 at room temperature . As a promising gas-sensitive material for NO 2 detection that can drastically lower operating temperatures, 2D metal chalcogenides have just come to light. − It should be noted that physisorption is the dominant interaction between the NO 2 gas molecules and 2D metal chalcogenides. The surface reactions differ from those of chemisorption in MOS-based gas sensors, which strongly rely on the catalytic reaction of surface-adsorbed oxygen with NO 2 . , Nevertheless, the incomplete reversibility of metal chalcogenide-based gas sensors operating at room temperature continues to pose practical limitations. , More importantly, 2D metal chalcogenides could react with O 2 and H 2 O due to the existence of sulfur vacancies produced in the synthesis process, which could result in the decrease of gas response and long-term stability. , …”

“…31 O 0.69 sensors under cyan light irradiation, while varying the relative humidity (RH) values at 5 ppm of NO 2 , as illustrated in FigureS11. The gas response decreases from 43.75% under dry conditions to 41.17, 40.56, 39.12, and 37.67% at 14.5% RH, 24.6% RH, 35.2% RH, and 46.3% RH, respectively, owing to the water molecule competition adsorption with NO 2 74.…”

One-step green synthesis of Cu2O/CuO@rGO composites for ppt level detection of NO2 at room temperature

“…Copper oxides (CuO and Cu 2 O) have wide ranging sources, 9 low prices, 10 narrow bandgaps (p-type), 11–14 and have great potential for gas sensing, 15,16 especially for the detection of NO 2 gas. 17–20 However, gas sensors based on a single component of copper oxides are usually unsatisfactory and show some problems including: (1) a high working temperature (100–400 °C) often leading to baseline drift, high power consumption, decaying stability and poor selectivity; 21 (2) mediocre long-term stability; 22 (3) a weak anti-interference ability. 23 These problems seriously affect their further practical application.…”