Molybdenum diselenide (MoSe 2 ) is a promising gas sensing material due to its large surface-to-volume ratio, narrow band gap, and excellent absorptions. However, MoSe 2 -based gas sensors possess inferior gas response and recovery at room temperature. In this context, assembly of hybrid structures can be an effective technique to stimulate the intrinsic structural and electronic properties of MoSe 2 nanosheets (NSs). Herein, we report interfacial science and engineering to design a unique p−n hetero nanostructure for the first time using MoSe 2 NSs doped with ZnO nanorods (ZNRs) through facile methods. The systematic material analyses revealed that MoSe 2 is consistently coated on the surface of ZNRs in this present hybrid combination. The MoSe 2 -ZNRs hybrid structure exhibits an excellent sensitivity (∼60%), which is better than those of pristine MoSe 2 NSs (20%) and ZNRs (10%) toward H 2 gas. It was revealed that the finest doping of MoSe 2 on the surface of ZNRs improves the H 2 gas sensing properties when compared to that of pristine ZNRs. This can be ascribed to the structure−property correlation, synergistic interfacial effects, and p−n hybrid hetero junctions between exfoliated MoSe 2 and ZNRs. The successful hybridization of the MoSe 2 -ZNRs hetero nanostructure paves the way to future opportunities on the hybridization and fabrication of MOS with TMDs gas sensors. KEYWORDS: exfoliated MoSe 2 , zinc oxide hybrids, MoSe 2 -doped ZNRs, MOS-TMD H 2 gas sensor, extra energy levels
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