Optical constants, photoluminescence and thermogravimetry of ZnS-ZnO hybrid nanowires synthesized via vapor transport

In this study, ZnS-ZnO hybrid nanowires (NWs) were synthesized using vapor transport synthesis method. The structure, morphology, optical properties, photoluminescence and thermogravimetric analysis of the samples were studied. Scanning electron microscopy images and X-ray diffraction pattern revealed that the ZnS-ZnO hybrid nanostructures are nanowires with mixed two hexagonal phases of ZnS and ZnO structures. The evaluated optical band gap was 3.62 eV which is close to the bulk ZnS value, whereas the refractive index value 1.85 (at 620 nm) is lower than the bulk ZnS value. The thermogravimetric analysis inferred that the ZnS-ZnO hybrid NWs could be stable up to similar to 652 degrees C and it may be used as a gas sensor up to this temperature. Under optical excitation, ZnS-ZnO hybrid NWs exhibited one ultraviolet and two blue emissions peaks. The ZnS-ZnO hybrid NWs is visualized to be promising for light-emitting diodes application.

Automated summary

In this study, ZnS-ZnO hybrid nanowires were successfully synthesized using vapor transport synthesis method. The structure, morphology, optical properties, photoluminescence, and thermogravimetric analysis of the nanowires were investigated. The results showed that the hybrid nanowires had stable properties and exhibited promising photoluminescent features, making them potentially useful in optoelectronic devices.