Role of molecular orbitals of the benzene in electronic nanodevices

Young Cheol Choi, Woo Youn Kim, Kee Su Park, Tarakeshwar Pilarisetty, Kwang S. Kim, Tae Suk Kim, Jin Yong Lee

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

In an effort to examine the intricacies of electronic nanodevices, we present an atomistic description of the electronic transport properties of an isolated benzene molecule. We have carried out ab initio calculations to understand the modulation of the molecular orbitals (MOs) and their energy spectra under the external electric field, and conducting behavior of the benzene molecule. Our study shows that with an increase in the applied electric field, the energy of the third lowest unoccupied molecular orbital (LUMO) of benzene decreases, while the first and second LUMO energies are not affected. Above a certain threshold of the external electric field, the third LUMO is lowered below the original LUMO and becomes the real LUMO. Since the transport through a molecule is to a large extent mediated by the molecular orbitals, the change in MOs can lead to a dramatic increase in the current passing through the benzene molecule. Thus, in the course of this study, we show that the modulation of the molecular orbitals in the presence of a tuning parameter(s) such as the external electric field can play important roles in the operation of molecular devices. We believe that this understanding would be helpful in the design of electronic nanodevices.

Original languageEnglish (US)
Article number094706
JournalJournal of Chemical Physics
Volume122
Issue number9
DOIs
StatePublished - Aug 5 2005
Externally publishedYes

Fingerprint

Molecular orbitals
Benzene
molecular orbitals
benzene
electronics
Electric fields
Molecules
electric fields
molecules
Modulation
modulation
Transport properties
energy spectra
Tuning
transport properties
tuning
conduction
thresholds
energy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Choi, Y. C., Kim, W. Y., Park, K. S., Pilarisetty, T., Kim, K. S., Kim, T. S., & Lee, J. Y. (2005). Role of molecular orbitals of the benzene in electronic nanodevices. Journal of Chemical Physics, 122(9), [094706]. https://doi.org/10.1063/1.1858851

Role of molecular orbitals of the benzene in electronic nanodevices. / Choi, Young Cheol; Kim, Woo Youn; Park, Kee Su; Pilarisetty, Tarakeshwar; Kim, Kwang S.; Kim, Tae Suk; Lee, Jin Yong.

In: Journal of Chemical Physics, Vol. 122, No. 9, 094706, 05.08.2005.

Research output: Contribution to journalArticle

Choi, Young Cheol ; Kim, Woo Youn ; Park, Kee Su ; Pilarisetty, Tarakeshwar ; Kim, Kwang S. ; Kim, Tae Suk ; Lee, Jin Yong. / Role of molecular orbitals of the benzene in electronic nanodevices. In: Journal of Chemical Physics. 2005 ; Vol. 122, No. 9.
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