Single Electron Effects In DNA Bases

Randhawa, D.K.K. and Singh, M.L. and Kaur, Inderpreet and Bharadwaj, L.M. (2011) Single Electron Effects In DNA Bases. International Journal of Advanced Engineering Technology, 2 (2). pp. 197-201. ISSN 0976-3945

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The reducing sizes of electron devices are also reducing the magnitude of current flow through the devices. The Single electron devices are nanoelectronic devices that can be used to control and manipulate flow of a single electron. Coulomb blockade is a typical single electron phenomenon. In this paper the molecular energy levels of DNA base molecules Adenine, Thymine, Guanine and Cytosine are studied to predict their suitability for use in room temperature single electron devices. The charging energy of molecules is indicated by the energy gap between the HOMO and LUMO called HOMO-LUMO gap (HLG). The energy of molecular orbitals are calculated by Hartree Fock method using STO-3G basis set in Gaussian 03 program for the four bases of DNA. It was found that all the four base molecules have HLG’s larger than the thermal energy at room temperature. The energy levels were also calculated for the anionic and cationic forms of the DNA bases. It is observed that there is formation of Coulomb blockade on anionic bases and a Coulomb well on cationic bases.

Item Type: Article
Uncontrolled Keywords: Single electron devices, Coulomb Blockade, DNA bases, HOMO, LUMO
Subjects: CSIO > Nano Science and Nano Technology
Depositing User: Ms. J Shrivastav
Date Deposited: 20 Nov 2012 08:41
Last Modified: 20 Nov 2012 08:41

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