I-V characteristics on G4 DNA molecule: Electric field and current dependent hopping amplitude model

E. N. Sinurat, E. Yudiarsah

Research output: Contribution to journalConference articlepeer-review

Abstract

We study the charge transport property of G4 DNA molecule by calculating the I-V characteristics at several temperatures. The G4 DNA we used consists of 32 G-tetrads built from four guanine bases and is contacted to metallic electrodes at both ends. The molecule is represented mathematically by using tight binding Hamiltonian model. Miller-abrahams scheme is used in calculating electron hopping constant under electric field which is applied along the molecular axis of DNA. Temperature is considered in the model by assuming twisting angles are distributed following Gaussian distribution. The current as voltage function is calculated using Landauer-Buttiker formalism from transmission probabilities. The result show that twisting motion due thermal agitation weakens the effect of electric field.

Original languageEnglish
Article number012023
JournalIOP Conference Series: Materials Science and Engineering
Volume578
Issue number1
DOIs
Publication statusPublished - 4 Oct 2019
Event3rd International Conference on Advanced Material for Better Future 2018, ICAMBF 2018 - Surakarta, Central Java, Indonesia
Duration: 15 Oct 201816 Oct 2018

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