Electronic conduction of poly(dG)-poly(dC) DNA in SWNT/DNA/SWNT structure
In this work, using a tight-binding Hamiltonian model, a generalized Greens function method and Löwdins partitioning techniques, some of the significant properties of the conductance of poly(dG)-poly(dC) DNA molecule in SWNT/DNA/SWNT structure are numerically investigated. In Fishbone model, we co...
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Isfahan University of Technology
2008-12-01
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doaj-227c822fb81342748ed3260ae54dc9c32020-11-24T21:51:06ZengIsfahan University of TechnologyIranian Journal of Physics Research1682-69572008-12-0184249249Electronic conduction of poly(dG)-poly(dC) DNA in SWNT/DNA/SWNT structureS. A. KetabiA. Ahmadi FouladiN. Shahtahmasebi In this work, using a tight-binding Hamiltonian model, a generalized Greens function method and Löwdins partitioning techniques, some of the significant properties of the conductance of poly(dG)-poly(dC) DNA molecule in SWNT/DNA/SWNT structure are numerically investigated. In Fishbone model, we consider DNA as a planar molecule which contains M cells and 3 further sites (one base pair site and two backbone sites) in each cell sandwiched between two semi-infinite single-walled carbon nanotubes(SWNT) as the nano-electrodes. Relying on Landauer formalism as the basis for investigating the conductance properties of this system, we focus on the studying of the electron transmission and the current-voltage characteristics of DNA in the foregoing structure. In addition, in the presence of the electric potential between DNA molecule ends, our results suggest that the increasing of the value of applied bias give rise to the large enhancement in the conductance of the system. We also find that, as the tube radius increases, the conductance of the system considerably increases. http://ijpr.iut.ac.ir/browse.php?a_code=A-10-1-299&slc_lang=en&sid=1DNAelectronic transmissioncarbon nanotubeFishbone modelGreens function |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
S. A. Ketabi A. Ahmadi Fouladi N. Shahtahmasebi |
spellingShingle |
S. A. Ketabi A. Ahmadi Fouladi N. Shahtahmasebi Electronic conduction of poly(dG)-poly(dC) DNA in SWNT/DNA/SWNT structure Iranian Journal of Physics Research DNA electronic transmission carbon nanotube Fishbone model Greens function |
author_facet |
S. A. Ketabi A. Ahmadi Fouladi N. Shahtahmasebi |
author_sort |
S. A. Ketabi |
title |
Electronic conduction of poly(dG)-poly(dC) DNA in SWNT/DNA/SWNT structure |
title_short |
Electronic conduction of poly(dG)-poly(dC) DNA in SWNT/DNA/SWNT structure |
title_full |
Electronic conduction of poly(dG)-poly(dC) DNA in SWNT/DNA/SWNT structure |
title_fullStr |
Electronic conduction of poly(dG)-poly(dC) DNA in SWNT/DNA/SWNT structure |
title_full_unstemmed |
Electronic conduction of poly(dG)-poly(dC) DNA in SWNT/DNA/SWNT structure |
title_sort |
electronic conduction of poly(dg)-poly(dc) dna in swnt/dna/swnt structure |
publisher |
Isfahan University of Technology |
series |
Iranian Journal of Physics Research |
issn |
1682-6957 |
publishDate |
2008-12-01 |
description |
In this work, using a tight-binding Hamiltonian model, a generalized Greens function method and Löwdins partitioning techniques, some of the significant properties of the conductance of poly(dG)-poly(dC) DNA molecule in SWNT/DNA/SWNT structure are numerically investigated. In Fishbone model, we consider DNA as a planar molecule which contains M cells and 3 further sites (one base pair site and two backbone sites) in each cell sandwiched between two semi-infinite single-walled carbon nanotubes(SWNT) as the nano-electrodes. Relying on Landauer formalism as the basis for investigating the conductance properties of this system, we focus on the studying of the electron transmission and the current-voltage characteristics of DNA in the foregoing structure. In addition, in the presence of the electric potential between DNA molecule ends, our results suggest that the increasing of the value of applied bias give rise to the large enhancement in the conductance of the system. We also find that, as the tube radius increases, the conductance of the system considerably increases. |
topic |
DNA electronic transmission carbon nanotube Fishbone model Greens function |
url |
http://ijpr.iut.ac.ir/browse.php?a_code=A-10-1-299&slc_lang=en&sid=1 |
work_keys_str_mv |
AT saketabi electronicconductionofpolydgpolydcdnainswntdnaswntstructure AT aahmadifouladi electronicconductionofpolydgpolydcdnainswntdnaswntstructure AT nshahtahmasebi electronicconductionofpolydgpolydcdnainswntdnaswntstructure |
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