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Citation: FARMANZADEH Davood, AMIRAZAMI Abolfazl. Electric Field Dependence of (4, 0) Zigzag Model Single-Walled Carbon Nanotube[J]. Acta Physico-Chimica Sinica, ;2009, 25(11): 2343-2349. doi: 10.3866/PKU.WHXB20091105 shu

Electric Field Dependence of (4, 0) Zigzag Model Single-Walled Carbon Nanotube

1.
Department of Physical and Inorganic Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, I. R. Iran

Received Date: 14 April 2009
Available Online: 16 September 2009

The structural and electronic properties of a (4, 0) zigzag single-walled carbon nanotube (SWCNT) under parallel and transverse electric fields with strengths of 0-1.4×10-2 a.u. were studied using the density functional theory (DFT) B3LYP/6-31G* method. Results show that the properties of the SWCNT are dependent on the external electric field. The applied external electric field strongly affects the molecular dipole moments. The induced dipole moments increase linearly with increase in the electrical field intensities. This study shows that the application of parallel and transverse electric fields results in changes in the occupied and virtual molecular orbitals (MOs) but the energy gap between the highest occupied MO (HOMO) and the lowest unoccupied MO (LUMO) of this SWCNT is less sensitive to the electric field strength. The electronic spatial extent (ESE) and length of the SWCNT show small changes over the entire range of the applied electric field strengths. The natural bond orbital (NBO) electric charges on the atoms of the SWCNT show that increase in the external electric field strength increases the separation of the center of the positive and negative electric charges of the carbon nanotube.
- Single-walled carbon nanotube,
- Parallel and perpendicular electric field,
- Dipole moment,
- Density functional theory,
- B3LYP
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