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Article Abstract
In this work, we use a chemical method to design novel 2D-material/0D-quantum dot (MoS/SnS) heterostructures. Furthermore, the unique 2D/0D heterostructure enhanced the NO gas-sensing capability 3 times and increased the sensing recoverability by more than 90%. Advanced characterization tools such as SEM, TEM, XRD, and AFM confirm the formation of MoS/SnS heterojunction nanomaterials. Using AFM data, the average thickness of the MoS layer was found to be 5 nm. The highest sensor response of 0.33 with good repeatability was observed at 250 ppb of NO. Sensing characterization reveals the ultra-fast response time, that is, 74 s, at 50 ppb of NO. The limit of detection for detecting NO was also found to be very low, that is, 0.54 ppb, by using MoS/SnS heterostructures. The theoretical calculations based on density functional theory well corroborated and quantified the intermolecular interaction and gas adsorption on the surface of MoS/SnS.
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