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Temperature and Magnetic Field Driven Modifications in the I-V Features of Gold-DNA-Gold Structure I-V

The fabrication of Metal-DNA-Metal (MDM) structure-based high sensitivity sensors from DNA micro-and nanoarray strands is a key issue in their development. The tunable semiconducting response of DNA in the presence of external electromagnetic and thermal fields is a gift for molecular electronics. T...

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Main Authors: Khatir, N.M., Abdul-Malek, Z., Banihashemian, S.M.
Format: Article
Language:English
Published: MDPI 2014
Subjects:
Q Science (General)
QC Physics
Online Access:http://eprints.um.edu.my/17299/1/sensors-14-19229-v2.pdf
http://eprints.um.edu.my/17299/
http://dx.doi.org/10.3390/s141019229
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spelling my.um.eprints.172992017-05-22T04:54:53Z http://eprints.um.edu.my/17299/ Temperature and Magnetic Field Driven Modifications in the I-V Features of Gold-DNA-Gold Structure I-V Khatir, N.M. Abdul-Malek, Z. Banihashemian, S.M. Q Science (General) QC Physics The fabrication of Metal-DNA-Metal (MDM) structure-based high sensitivity sensors from DNA micro-and nanoarray strands is a key issue in their development. The tunable semiconducting response of DNA in the presence of external electromagnetic and thermal fields is a gift for molecular electronics. The impact of temperatures (25–55 °C) and magnetic fields (0–1200 mT) on the current-voltage (I-V) features of Au-DNA-Au (GDG) structures with an optimum gap of 10 μm is reported. The I-V characteristics acquired in the presence and absence of magnetic fields demonstrated the semiconducting diode nature of DNA in GDG structures with high temperature sensitivity. The saturation current in the absence of magnetic field was found to increase sharply with the increase of temperature up to 45 °C and decrease rapidly thereafter. This increase was attributed to the temperature-assisted conversion of double bonds into single bond in DNA structures. Furthermore, the potential barrier height and Richardson constant for all the structures increased steadily with the increase of external magnetic field irrespective of temperature variations. Our observation on magnetic field and temperature sensitivity of I-V response in GDG sandwiches may contribute towards the development of DNA-based magnetic sensors. MDPI 2014 Article PeerReviewed application/pdf en http://eprints.um.edu.my/17299/1/sensors-14-19229-v2.pdf Khatir, N.M. and Abdul-Malek, Z. and Banihashemian, S.M. (2014) Temperature and Magnetic Field Driven Modifications in the I-V Features of Gold-DNA-Gold Structure I-V. Sensors, 14 (10). pp. 19229-19241. ISSN 1424-8220 http://dx.doi.org/10.3390/s141019229 doi:10.3390/s141019229
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
language English
topic Q Science (General)
QC Physics
spellingShingle Q Science (General)
QC Physics
Khatir, N.M.
Abdul-Malek, Z.
Banihashemian, S.M.
Temperature and Magnetic Field Driven Modifications in the I-V Features of Gold-DNA-Gold Structure I-V
description The fabrication of Metal-DNA-Metal (MDM) structure-based high sensitivity sensors from DNA micro-and nanoarray strands is a key issue in their development. The tunable semiconducting response of DNA in the presence of external electromagnetic and thermal fields is a gift for molecular electronics. The impact of temperatures (25–55 °C) and magnetic fields (0–1200 mT) on the current-voltage (I-V) features of Au-DNA-Au (GDG) structures with an optimum gap of 10 μm is reported. The I-V characteristics acquired in the presence and absence of magnetic fields demonstrated the semiconducting diode nature of DNA in GDG structures with high temperature sensitivity. The saturation current in the absence of magnetic field was found to increase sharply with the increase of temperature up to 45 °C and decrease rapidly thereafter. This increase was attributed to the temperature-assisted conversion of double bonds into single bond in DNA structures. Furthermore, the potential barrier height and Richardson constant for all the structures increased steadily with the increase of external magnetic field irrespective of temperature variations. Our observation on magnetic field and temperature sensitivity of I-V response in GDG sandwiches may contribute towards the development of DNA-based magnetic sensors.
format Article
author Khatir, N.M.
Abdul-Malek, Z.
Banihashemian, S.M.
author_facet Khatir, N.M.
Abdul-Malek, Z.
Banihashemian, S.M.
author_sort Khatir, N.M.
title Temperature and Magnetic Field Driven Modifications in the I-V Features of Gold-DNA-Gold Structure I-V
title_short Temperature and Magnetic Field Driven Modifications in the I-V Features of Gold-DNA-Gold Structure I-V
title_full Temperature and Magnetic Field Driven Modifications in the I-V Features of Gold-DNA-Gold Structure I-V
title_fullStr Temperature and Magnetic Field Driven Modifications in the I-V Features of Gold-DNA-Gold Structure I-V
title_full_unstemmed Temperature and Magnetic Field Driven Modifications in the I-V Features of Gold-DNA-Gold Structure I-V
title_sort temperature and magnetic field driven modifications in the i-v features of gold-dna-gold structure i-v
publisher MDPI
publishDate 2014
url http://eprints.um.edu.my/17299/1/sensors-14-19229-v2.pdf
http://eprints.um.edu.my/17299/
http://dx.doi.org/10.3390/s141019229
_version_ 1643690405268553728
score 13.211869

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