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Reseach Article

DNA Bases as Molecular Electronic Devices

by Deep Kamal Kaur Randhawa, Lalit M. Bharadwaj, Inderpreet Kaur, M.L.Singh
International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 19 - Number 2
Year of Publication: 2011
Authors: Deep Kamal Kaur Randhawa, Lalit M. Bharadwaj, Inderpreet Kaur, M.L.Singh

Deep Kamal Kaur Randhawa, Lalit M. Bharadwaj, Inderpreet Kaur, M.L.Singh . DNA Bases as Molecular Electronic Devices. International Journal of Computer Applications. 19, 2 ( April 2011), 39-43. DOI=10.5120/2331-3031

@article{ 10.5120/2331-3031,
author = { Deep Kamal Kaur Randhawa, Lalit M. Bharadwaj, Inderpreet Kaur, M.L.Singh },
title = { DNA Bases as Molecular Electronic Devices },
journal = { International Journal of Computer Applications },
issue_date = { April 2011 },
volume = { 19 },
number = { 2 },
month = { April },
year = { 2011 },
issn = { 0975-8887 },
pages = { 39-43 },
numpages = {9},
url = { },
doi = { 10.5120/2331-3031 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
%0 Journal Article
%1 2024-02-06T20:05:58.529981+05:30
%A Deep Kamal Kaur Randhawa
%A Lalit M. Bharadwaj
%A Inderpreet Kaur
%A M.L.Singh
%T DNA Bases as Molecular Electronic Devices
%J International Journal of Computer Applications
%@ 0975-8887
%V 19
%N 2
%P 39-43
%D 2011
%I Foundation of Computer Science (FCS), NY, USA

The current voltage characteristics have been obtained for the four DNA bases Adenine, Thymine, Guanine and Cytosine by non-equilibrium Green’s function combined with density functional theory. The pattern of current flow for an applied voltage sweep of 0-5 V is plotted. The phenomenon of tunneling is exhibited in the characteristics of molecules. The DNA base cytosine displays a typical surge of current in the voltage sweep section of 0.4V-0.6V, indicating single electron effects. The effect of gate voltage on the current-voltage characteristics of cytosine was studied in the gated two-probe setup. The typical section of characteristics of cytosine was re-drawn by varying the gate potential. The application of gate bias exhibits excellent ON/OFF switching for combinations of the two applied voltages- source voltage and gate voltage. Repetitive peaks are also observed in current when gate voltage is varied, fixing source potential. In this paper the cytosine molecule is proposed as a switch, AND gate and OR gate in this paper that can be used in DNA based molecular electronic devices.

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Index Terms

Computer Science
Information Sciences


DNA bases tunneling single electron effects molecular electronic devices