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- Title
Effects of Metal Ions on Conductivity and Structure of Single DNA Molecule in Different Environmental Conditions.
- Authors
Dong, Ruixin; Yan, Xunling; Li, Ke; Ban, Ge; Wang, Minghong; Cui, Shouxin; Yang, Bing
- 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.
- Subjects
METAL ion spectra; SODIUM ions; DNA synthesis; NUCLEIC acids spectra; OXIDE electrodes; PROPERTIES of matter
- Publication
Nanoscale Research Letters, 2010, Vol 5, Issue 9, p1431
- ISSN
1931-7573
- Publication type
Article
- DOI
10.1007/s11671-010-9657-3