Journal
COMPUTATIONAL MATERIALS SCIENCE
Volume 84, Issue -, Pages 293-300Publisher
ELSEVIER
DOI: 10.1016/j.commatsci.2013.12.023
Keywords
Cadmium selenide nanowires; Molecular dynamics; Thermal stability
Categories
Funding
- National Natural Science Foundation of China [11004135, 51101102]
- Shanghai Municipal Education Commission [11YZ84]
- Shanghai Normal University [DXL121]
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The thermal stability and melting behavior of wurtzite CdSe nanowires have been studied by molecular dynamic simulation. The melting temperatures of CdSe nanowires show clear dependence on nanowires sizes and orientations. The overall melting temperatures of CdSe nanowires are much lower than that of bulk and will increase with increasing size. Compared with other oriented nanowires, the < 0001 > nanowire possesses a better thermal and structural stability, which helps to explain why wurtzite type CdSe nanowires prefer to grow in < 0001 > orientation during experiments. It is also found that the premelting of < 0001 > and < 10(1) over bar10 > nanowires starts from the surface atoms, while the premelting of < 2(1) over bar(1) over bar0 > nanowire starts from the interior atoms. This unique melting behavior for the < 2(1) over bar(1) over bar0 > nanowire may be related to the interesting structure reconstruction during the heating process. (C) 2013 Elsevier B.V. All rights reserved.
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