First principle electric field response of single-walled boron nitride nanotube: a case study of zigzag (4,0) model |
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Authors: | Davood Farmanzadeh Samereh Ghazanfary |
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Institution: | (1) Faculty of Chemistry, University of Mazandaran, P.O. Box 453, Babolsar, Islamic Republic of Iran |
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Abstract: | Structural and electrical responses of the (4,0) zigzag model of single-walled boron nitride (BN) nanotube (NT) (with edges
terminated by H atoms) have been investigated under the external electric fields (parallel and transverse) with strengths
0−2.0 × 10−2 a.u. using DFT-B3LYP/6-31G* method. Calculated electric dipole moment shows a significant change in the presence of the parallel
and perpendicular external electric fields which result in much stronger interactions at higher electric field strengths.
Natural bond orbital (NBO) atomic charges analysis shows that the separation of the center of the positive and the center
of the negative electric charges of (4,0) zigzag BNNT increase with increase the applied parallel and transverse electric
field strengths. The applied fields change the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital
(LUMO) energies and decrease the HOMO–LUMO gap (HLG) values. The calculated electronic spatial extent (ESE) showed small changes
of <0.63% and <1.53% over the entire range of the applied parallel and perpendicular electric field strengths, respectively.
Results of this study indicate that the properties of BNNTs can be controlled by applying the proper external electric field.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. |
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Keywords: | Electric field effect Ab initio calculation DFT-B3LYP BN nanotube |
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