Journal
COMPUTATIONAL MATERIALS SCIENCE
Volume 48, Issue 1, Pages 144-149Publisher
ELSEVIER
DOI: 10.1016/j.commatsci.2009.12.021
Keywords
Silicon carbon nanotube; Armchair nanotube; Aromaticity; Static polarizability; NICS
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Optimization of finite-length armchair single-wall silicon carbon nanotubes (SiCNTs), with alternating carbon and silicon bonds, exhibit only one structural network, whereas the carbon nanotubes (CNTs) show three different classes of networks at different (succeeding) tubular lengths. The SiCNTs immerge in a clear contrast to the CNTs which demonstrate strong ring currents, bond length variations, and the abrupt changes of Delta ELUMO-HOMO, as the tube elongates. In addition, the magnitudes of polarizability tensors increase as functions of length and width for the SiCNTs, which appear similar to 2 folds higher than the CNTs with the same number of atoms. (C) 2009 Elsevier B.V. All rights reserved.
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