Electrical Characterization of Gold-DNA-Gold Structures in Presence of an External Magnetic Field by Means of I-V Curve Analysis

Khatir, N.M. and Banihashemian, S.M. and Periasamy, V. and Ritikos, R. and Abd Majid, Wan Haliza and Rahman, S.A. (2012) Electrical Characterization of Gold-DNA-Gold Structures in Presence of an External Magnetic Field by Means of I-V Curve Analysis. Sensors, 12 (3). pp. 3578-3586. ISSN 1424-8220, DOI https://doi.org/10.3390/s120303578.

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Abstract

This work presents an experimental study of gold-DNA-gold structures in the presence and absence of external magnetic fields with strengths less than 1,200.00 mT. The DNA strands, extracted by standard method were used to fabricate a Metal-DNA-Metal (MDM) structure. Its electric behavior when subjected to a magnetic field was studied through its current-voltage (I-V) curve. Acquisition of the I-V curve demonstrated that DNA as a semiconductor exhibits diode behavior in the MDM structure. The current versus magnetic field strength followed a decreasing trend because of a diminished mobility in the presence of a low magnetic field. This made clear that an externally imposed magnetic field would boost resistance of the MDM structure up to 1,000.00 mT and for higher magnetic field strengths we can observe an increase in potential barrier in MDM junction. The magnetic sensitivity indicates the promise of using MDM structures as potential magnetic sensors.

Item Type: Article
Funders: UNSPECIFIED
Additional Information: Khatir, Nadia Mahmoudi Banihashemian, Seyedeh Maryam Periasamy, Vengadesh Ritikos, Richard Abd Majid, Wan Haliza Rahman, Saadah Abdul
Uncontrolled Keywords: DNA/*chemistry Electricity Electrodes Gold/*chemistry *Magnetic Fields Semiconductors Silicon/chemistry Temperature
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Department of Physics
Depositing User: miss munirah saadom
Date Deposited: 04 Jan 2013 16:01
Last Modified: 18 Dec 2019 08:04
URI: http://eprints.um.edu.my/id/eprint/5696

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