Please use this identifier to cite or link to this item:
|Title:||Structural and electronic properties of 4 Å carbon nanotubes on Si(001) surfaces|
|Authors:||Peng, G.W. |
|Citation:||Peng, G.W., Huan, A.C.H., Liu, L., Feng, Y.P. (2006). Structural and electronic properties of 4 Å carbon nanotubes on Si(001) surfaces. Physical Review B - Condensed Matter and Materials Physics 74 (23) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.74.235416|
|Abstract:||The structural and electronic properties of a single-walled 4 Å (3,3) carbon nanotube (CNT) adsorbed on the Si(001) surface are studied using a first-principles method. It is found that for CNTs parallel to the dimer rows, the surface trench is the most stable adsorption site, while CNTs perpendicular to the dimer rows prefer to be adsorbed between Si surface dimers. The stable structures are characterized by four C-Si covalent bonds and large binding energies, 0.38-0.39 eV per unit length of the CNT. The electronic properties of the adsorbed structures are sensitive to the CNT adsorption sites. The structure is semiconducting when the adsorbed CNT is at the trench site, while it is metallic when the CNT is adsorbed between Si dimers. The metal-semiconductor transition of the CNT at the surface trench site is due to the formation of C-Si covalent bonds. The adsorption of a 3 Å (2,2) CNT inside a (6,6) CNT on Si(001) surfaces is also discussed. © 2006 The American Physical Society.|
|Source Title:||Physical Review B - Condensed Matter and Materials Physics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jul 18, 2018
WEB OF SCIENCETM
checked on Jun 4, 2018
checked on Mar 12, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.