Fabrication of semiconductor CdS hierarchical nanostructures

• Published in: Journal of crystal growth Vol. 293; no. 2; pp. 236 - 241
• Main Authors: Zhang, Jun, Yang, Yongdong, Jiang, Feihong, Li, Jianping, Xu, Baolong, Wang, Shumei, Wang, Xichang
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-08-2006; Elsevier
• Subjects: A1. Methods of materials synthesis and material processing; B1. Nanocrystalline materials; B2. Semiconducting materials; B3. Nanometer-scale fabrication technology; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Methods of nanofabrication; Physics; Self-assembly; B3. Nanometer-scale fabrication technology; A1. Methods of materials synthesis and material processing; 73.61.Tm; 78.40.Fy; 81.20.−n; 85.40.Ux; B2. Semiconducting materials; B1. Nanocrystalline materials; Inorganic compounds; Crystal orientation; Cadmium sulfides; XRD; SAED; Alignment; Sensors; Scanning electron microscopy; Powders; Transition element compounds; Energy-dispersive X-ray spectrometer; Binary compounds; VLS growth; Evaporation; B 1. Nanocrystalline materials; Experimental study; Dispersive spectrometry; Self-assembly; Transmission electron microscopy; II-VI semiconductors; 81.20.-n; Morphology; Nanowires; Microstructure; Nanostructured materials
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/j.jcrysgro.2006.05.034

Semiconductor CdS hierarchical nanostructures have been fabricated through thermal evaporation with a mixture of CdS nanopowders, SnO
2 nanopowders, and graphite powders. Sn nanoparticles are located at or close to the tips of the nanowires and the growth branches served as the catalyst for the growth of a vapor–liquid–solid mechanism. The morphology and microstructure of CdS axial nanowires and branches were measured by scanning electron microscopy and high-resolution transmission electron microscopy. The long and straight central axial CdS nanowires grow along the [0
0
0
1] direction. Branched CdS nanoneedles are vertically aligned over the surface of the CdS axial nanowire in the radial direction. The hierarchical nanostructures could be a candidate for building ultrahigh sensitivity sensors due to the unique structure.