Nano Archive

Effects of Metal Ions on Conductivity and Structure of Single DNA Molecule in Different Environmental Conditions

Dong, Ruixin and Yan, Xunling and Li, Ke and Ban, Ge and Wang, Minghong and Cui, Shouxin and Yang, Bing (2010) Effects of Metal Ions on Conductivity and Structure of Single DNA Molecule in Different Environmental Conditions. Nanoscale Research Letters, 5 (9). pp. 1431-1436.

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Abstract

We design a novel nano-gap electrode to measure the current of DNA molecule, by which the current–voltage characteristics of individual native DNA, Ag-DNA and Ni-DNA molecules are obtained, respectively. The results show that the voltage gap of Ag- and Ni-DNA is higher than that of native DNA, and the conductance is lower than native DNA in neutral environment. The structure transition from B- to Z-DNA is observed in the presence of high concentrations of nickel ions and Ag-DNA appears chaos state by STM image and U-V spectra characterization. But in alkaline environment, the conductance of Ni-DNA rises and the voltage gap decreases with the increasing of nickel ion concentration denotes that the conductive ability of Ni-DNA is higher than that of native DNA.

Item Type:Article
Uncontrolled Keywords:DNA, Metal ions, Nano-gap electrode, Conductivity, Structure
Subjects:Biomedical Science > Nanoscale biological processes
ID Code:9542
Deposited By:SPI
Deposited On:21 Oct 2010 09:29
Last Modified:21 Oct 2010 09:29

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