Abstract
The ability of DNA to conduct electric current has been the topic of numerous investigations over the past few decades. Those investigations indicate that this ability is dependent on the molecular structure of the DNA. Radiation-induced damages, which lead to an alteration of the molecular structure, should therefore change the electrical impedance of a DNA molecule. In this paper, the damage due to ionising radiation is shown to have a direct effect on the electrical transport properties of DNA. Impedance measurements of DNA samples were carried out by an AC impedance spectrometer before, during and after irradiation. The samples comprised of DNA segments, which were immobilized between gold electrodes with a gap of 12 μm. The impedance of all DNA samples exhibited rising capacitive behaviour with increasing absorbed dose.
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Contribution to the Topical Issue “Dynamics of Systems at the Nanoscale”, edited by Andrey Solov’yov and Andrei Korol.
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Heimbach, F., Arndt, A., Nettelbeck, H. et al. Measurement of changes in impedance of DNA nanowires due to radiation induced structural damage. Eur. Phys. J. D 71, 211 (2017). https://doi.org/10.1140/epjd/e2017-70819-1
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DOI: https://doi.org/10.1140/epjd/e2017-70819-1