This p-type-like sensing behavior is attributed to the heterointerface of MoS 2-MoO 3 where interfacial charge transfer leads to a p-type inversion layer in MoS 2, and is enhanced by magnetic dipole interactions between the paramagnetic NO 2 and the ferromagnetic sensing layer. The MoS 3 gas sensors display a p-type-like response towards NO 2 with a detection limit of 0.15 ppm at a working temperature of 125 ☌, as well as superb selectivity and reversibility. The MoS 3 hybrids also exhibit room-temperature ferromagnetism, revealed by vibrating sample magnetometry (VSM), as a result of the sulfurization process. Hence, we developed a dual-signal fluorescent strategy using MoS 2 QDs and CdTe QDs for rapid and sensitive detection of TET in milk. The limit of detection of NO 2gas at the level of 0. The morphological, structural, and compositional properties of the MoS 3 hybrids were studied by a combination of advanced characterization techniques revealing a core-shell structure with the coexistence of 2H-MoS 2 multilayers and intermediate molybdenum oxysulfides on the surface of α-MoO 3. Further optimization of the MoS 2 -based optoelectronic gas sensor by using graphene (Gr) with a work function lower than that of Au for the electrical contacts to the MoS 2channel allowed an increase of photocurrent. Owing to the advantages of low power consumption, convenient design and simple preparation, room temperature (RT) gas sensors have been widely studied in recent years. A dual-signal fluorescent sensor was developed for tetracycline (TET) detection in milk with excellent reproducibility and stability. In this work, we synthesized 2D MoS 3 heterostructures through post-sulfurization of α-MoO 3 nanoribbons grown via vapor phase transport (VPT) and demonstrated highly sensitive NO 2 gas sensors based on the hybrid heterostructures. Synthesis of highly reproducible CdTe nanotubes on anodized alumina template and. Recently, two-dimensional (2D) materials and their heterostructures have attracted considerable attention in gas sensing applications. Patent entitled A process for making MWCNTs based NH3/NO2 gas sensor.
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