Abstract
Self-assembled metal-semiconductor nanostructures for the fabrication of integrated circuitry nanodevices are currently actively pursuited. One prominent example is the one-dimensional semiconductor (CdS) nanobelt on metallic (Cd) heterojunction. In this work, we have synthesized hexagonal Cd micro-rods, Cd micro-spheres and Cd-CdS micro/nano hetrostructures using a simple chemical vapor deposition (CVD) method. In addition to the optimization of synthesis parameters for these micro/nanostructures, we explored the effect of the inclination angle between the substrate and the furnace on the morphologies of these products. Using a range of characterization tools including scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDXS), X-ray photoelectron spectroscopy (XPS), we characterized these micro/nanostructures and found them to be of high quality crystals. Moreover, we performed photoluminescence and lifetime decay studies to confirm that heterostructures are composed of metal-semiconductor heterojunction. These micro/nano-heterostructures are anticipated to be used in photocatalysis and photoelectronic devices.
•First synthesis of Cd micro-rods, Cd micro-spheres and Cd-CdS micro/nano hetrostructures via CVD technique.•Substrate temperature and its inclination angle plays vital role to influence their shape and structure.•Plasmon emissions in micrometer sized monocrystal and microcrystal agglomerate can be observed.•Local plasmon emission and plasmon–exciton interactions related luminescence confirming metal-semiconductor heterostructure.•These micro/nano-heterostructures point out their potential applications in photocatalysis and photoelectronic devices.