Synthesis and characterization of GaN/ZnS core–shell nanowires

• Published in: Materials letters Vol. 87; pp. 73 - 76
• Main Authors: Zhang, A.L., Zhang, Z.H., Tao, H.L., Wu, R., Li, J., Sun, Y.F., Jian, J.K.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.11.2012
• Subjects: Chemical vapor deposition; energy; evaporation; GaN/ZnS core–shell nanowires; nanoparticles; nanowires; Raman spectroscopy; scanning electron microscopy; transmission electron microscopy; Vacuum thermal evaporation; vapors; X-radiation; Chemical vapor deposition; GaN/ZnS core–shell nanowires; Vacuum thermal evaporation
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2012.07.097

GaN/ZnS core–shell nanowires have been synthesized via a two-step route involving catalyst-assisted chemical vapor deposition and vacuum thermal evaporation. Morphology, micro-structure and compositions of the as-prepared core–shell nanowires were characterized by scanning electron microscopy, transmission electron microscopy and energy dispersive X-ray spectroscopy. Lattice vibrations of the nanowires were studied by Raman scattering spectra. It is found that two kinds of radial GaN/ZnS heterojunctions, i.e. GaN nanowires cores coated with uniform polycrystalline ZnS layers or nanoparticles, have been synthesized. Such novel GaN/ZnS core–shell nanowires have potential applications in optoelectronics and the fabrication approach developed here is facile and may be extended to other one-dimensional radial heterostructured nanowires. ► GaN/ZnS core–shell nanowires have been synthesized via a two-step route involving chemical vapor deposition and vacuum thermal evaporation. ► Morphologies, microstructures and composition distribution of the as-fabricated core–shell nanowires were characterized in details. ► Lattice vibration of GaN/ZnS core–shell nanowires were examined by Raman scattering spectrum.