Electrical characterization of gold-DNA-gold structures in presence of an external magnetic field by means of I-V curve analysis

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 subjec...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2012-03, Vol.12 (3), p.3578-3586
Main Authors: Khatir, Nadia Mahmoudi, Banihashemian, Seyedeh Maryam, Periasamy, Vengadesh, Ritikos, Richard, Majid, Wan Haliza Abd, Rahman, Saadah Abdul
Format: Article
Language:English
Subjects:
Deoxyribonucleic acid
Diodes
DNA - chemistry
Electric fields
Electricity
Electrodes
Gold
Gold - chemistry
Laboratories
magnetic field
Magnetic Fields
magnetic sensor
Metal-DNA-Metal (MDM)
Schottky diode
Semiconductors
Sensors
Silicon - chemistry
Strength
Temperature
Volt-ampere characteristics
Wire
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Summary: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.
ISSN:1424-8220
1424-8220
DOI:10.3390/s120303578