Growth and photoluminescence of zinc blende ZnS nanowires via metalorganic chemical vapor deposition

• Published in: Journal of alloys and compounds Vol. 509; no. 19; pp. 5769 - 5772
• Main Authors: Lei, M., Fu, X.L., Li, P.G., Tang, W.H.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 12-05-2011; Elsevier
• Subjects: Blends; Chemical synthesis methods; Cross-disciplinary physics: materials science; rheology; Crystal defects; Crystal structure; Exact sciences and technology; Materials science; Metalorganic chemical vapor deposition; Methods of nanofabrication; Nanoscale materials and structures: fabrication and characterization; Nanostructured materials; Nanowires; Optical property; Photoluminescence; Physics; Quantum wires; Semiconductors; Zinc; Zinc sulfides; Semiconductors; Optical property; Nanostructured materials; Vacancies; Blende structure; Photoluminescence; VLS growth; MOCVD; Surface states; Substrat temperature; Defects; Monocrystals; Transmission electron microscopy; II-VI semiconductors; Optical properties; Growth mechanism; Nanowires; Nanomaterial synthesis
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2011.02.029

► Metalorganic chemical vapor deposition was developed to synthesize ZnS nanowires at low temperatures. ► The ZnS nanowires have zinc blende structure, and most of them have raw-like surface on the one edge. ► The sulfur vacancies and surface states should be responsible for the two blue emissions, respectively.
We developed a metalorganic chemical vapor deposition to synthesize ZnS nanowires with high purity on Au-coated sapphire substrates at low temperatures. The ZnS nanowires have zinc blende structure, and most of them have raw-like surface on one edge, while is smooth on the other. High-resolution transmission electron microscopic investigations show that the nanowires are well crystalline single crystal grown along [1
1
1] and are free of bulk defects. The growth mechanism is confirmed as a typical vapor–liquid–solid process. The photoluminescence spectrum reveals two prominent blue emissions centered at 452.2 and 468.6
nm, respectively. It is found that sulfur vacancies and surface states should be responsible for the two blue emissions, respectively.