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2012 | 121 | 3 | 673-677
Article title

A DNA Biosensor Based Interface States of a Metal-Insulator-Semiconductor Diode for Biotechnology Applications

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EN
Abstracts
EN
We studied how a DNA sensor based on the interface states of a conventional metal-insulator-semiconductor diode can be prepared for biotechnology applications. For this purpose, the p-type silicon/metal diodes were prepared using SiO_2 and DNA layers. The obtained results were analyzed and compared with interfaces of DNA and SiO_2. It is seen that the ideality factor (1.82) of the Al/p-Si/SiO_2/DNA/Ag diode is lower than that (3.31) of the Al/p-Si/SiO_2/Ag diode. This indicates that the electronic performance of DNA/Si junction was better than that of SiO_2/Si junction. The interface states of the Al/p-Si/SiO_2/DNA/Ag and Al/p-Si/SiO_2/Ag junctions were analyzed by conductance technique. The obtained D_{it} values indicate that the DNA layer is an effective parameter to control the interface states of the conventional Si based on metal/semiconductor contacts. Results exhibited that DNA based metal-insulator-semiconductor diode could be used as DNA sensor for biotechnology applications.
Keywords
EN
Contributors
author
  • Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
author
  • Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
  • Department of Physics, Faculty of Science, Tabuk University, Tabuk 71491, Saudi Arabia
author
  • Engineering Research Center, North Carolina A & T State University, North Carolina 27411, USA
author
  • Department of Physics, Faculty of Science, Suez Canal University, Ismailia, Egypt
author
  • Department of Environmental Engineering, Firat University, Elaziğ, Turkey
  • Center for Biotechnology Research, Firat University, Elazig, Turkey
author
  • Department of Environmental Engineering, Firat University, Elaziğ, Turkey
  • Center for Biotechnology Research, Firat University, Elazig, Turkey
  • Department of Physics, Faculty of Science, Firat University, Elazig, Turkey
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Document Type
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Identifiers
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bwmeta1.element.bwnjournal-article-a121z3p19kz
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