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.
|Journal||IOP Conference Series: Materials Science and Engineering|
|Publication status||Published - 4 Oct 2019|
|Event||3rd International Conference on Advanced Material for Better Future 2018, ICAMBF 2018 - Surakarta, Central Java, Indonesia|
Duration: 15 Oct 2018 → 16 Oct 2018