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 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.
Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Nadia Mahmoudi
NM
Khatir
Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Seyedeh Maryam
SM
Banihashemian
Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Vengadesh
V
Periasamy
Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Richard
R
Ritikos
Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Wan Haliza Abd
WHA
Majid
Low Dimensional Materials Research Centre, Department of Physics, University of Malaya, 50603, Kuala Lumpur, Malaysia.
Saadah Abdul
SA
Rahman
D004247:DNA / Q000737:chemistry*; D004560:Electricity; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D060526:Magnetic Fields; D012666:Semiconductors; D012825:Silicon / Q000737:chemistry; D013696:Temperature
D006046:Gold; D004247:DNA; D012825:Silicon