I-V characteristics of a four-chain DNA model in environment disorder

K. A. Rahmi, Efta Yudiarsah

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

The I-V characteristic of a DNA molecule modeled with four chains have been studied. The DNA molecule under study is a poly(dA)-poly(dT) DNA molecule with length of 32 base pairs. In tight binding Hamiltonian model, we assumed that electron could hop between two neighboring bases, two neighboring backbones, a base and a backbone. The DNA molecule is contacted to a metallic electrode at both ends. Environmental effect is considered by taking into account temperature and backbone onsite energy disorder in the Hamiltonian. In addition to affecting bases onsite energy, temperature also affects interbase electron hopping constant, which is described using Slater-Koster semi empirical theory. I-V characteristics are calculated using Landauer-Buttiker Formula. The result shows that as the backbone disorder increases, current maximum decreases. Current increases and threshold voltage is shifted to higher voltage as temperature decreases.

Original languageEnglish
Title of host publicationProceedings of the 3rd International Symposium on Current Progress in Mathematics and Sciences 2017, ISCPMS 2017
EditorsRatna Yuniati, Terry Mart, Ivandini T. Anggraningrum, Djoko Triyono, Kiki A. Sugeng
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735417410
DOIs
Publication statusPublished - 22 Oct 2018
Event3rd International Symposium on Current Progress in Mathematics and Sciences 2017, ISCPMS 2017 - Bali, Indonesia
Duration: 26 Jul 201727 Jul 2017

Publication series

NameAIP Conference Proceedings
Volume2023
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference3rd International Symposium on Current Progress in Mathematics and Sciences 2017, ISCPMS 2017
CountryIndonesia
CityBali
Period26/07/1727/07/17

Keywords

  • The I-V characteristic
  • backbone disorder
  • interbase electron hopping
  • poly(dA)-poly(dT) DNA molecule
  • temperature

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