Sensors 2012, 12(3), 3578-3586; doi:10.3390/s120303578
Article

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

Nadia Mahmoudi Khatir* email, Seyedeh Maryam Banihashemian* email, Vengadesh Periasamyemail, Richard Ritikosemail, Wan Haliza Abd Majidemail and Saadah Abdul Rahmanemail
Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, 50603, Kuala Lumpur, Malaysia
* Authors to whom correspondence should be addressed.
Received: 21 January 2012; in revised form: 1 March 2012 / Accepted: 3 March 2012 / Published: 14 March 2012
(This article belongs to the Special Issue Nano-Biosensors)
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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.
Keywords: Metal-DNA-Metal (MDM); magnetic field; magnetic sensor; Schottky diode

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Cite This Article

MDPI and ACS Style

Khatir, N.M.; Banihashemian, S.M.; Periasamy, V.; Ritikos, R.; Majid, W.H.A.; Rahman, S.A. Electrical Characterization of Gold-DNA-Gold Structures in Presence of an External Magnetic Field by Means of I-V Curve Analysis. Sensors 2012, 12, 3578-3586.

AMA Style

Khatir NM, Banihashemian SM, Periasamy V, Ritikos R, Majid WHA, Rahman SA. Electrical Characterization of Gold-DNA-Gold Structures in Presence of an External Magnetic Field by Means of I-V Curve Analysis. Sensors. 2012; 12(3):3578-3586.

Chicago/Turabian Style

Khatir, Nadia Mahmoudi; Banihashemian, Seyedeh Maryam; Periasamy, Vengadesh; Ritikos, Richard; Majid, Wan Haliza Abd; Rahman, Saadah Abdul. 2012. "Electrical Characterization of Gold-DNA-Gold Structures in Presence of an External Magnetic Field by Means of I-V Curve Analysis." Sensors 12, no. 3: 3578-3586.

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