Decoration of CdS nanoparticles on 3D self-assembled ZnO nanorods: a single-step process with enhanced field emission behaviour

摘要: A well-defined CdS–ZnO heteroarchitecture has been synthesized via a facile single-step hydrothermal approach. The morphological and structural studies reveal the formation of 3D nano-architectures, in which self-assembled ZnO nanorods (diameter ~50 nm) are well decorated with single crystalline CdS nanoparticles (size ~10 nm). exhibits remarkable change optical absorption due to surface modification by CdS. Surprisingly, under identical reaction conditions, global ZnS selectively grown at apex on Zn substrate. Furthermore, plausible growth mechanism presented basis experimental results. Interestingly, shows enhanced field emission properties such as low turn-on field, high current density better stability comparison other ZnO-based nanostructures. present could be extended potential applications, chemical sensors, photodetectors, optoelectronic devices, photocatalysts.