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DNA Bases as Molecular Electronic Devices

by Deep Kamal Kaur Randhawa, Lalit M. Bharadwaj, Inderpreet Kaur, M.L.Singh
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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
10.5120/2331-3031

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 = { https://ijcaonline.org/archives/volume19/number2/2331-3031/ },
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
Abstract

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

Keywords

DNA bases tunneling single electron effects molecular electronic devices

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