Impedance measurements on a DNA junction

Sungmin Hong, Luis A. Jauregui, Norma L. Rangel, Huan Cao, B. Scott Day, Michael L. Norton, Alexander Sinitskii, Jorge M. Seminario

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

1 μm double-stranded DNA molecules are immobilized between pairs of gold and pairs of platinum microelectrodes with gaps of 0.4 and 1 μm, respectively, and their electrical characteristics are determined under the application of constant and sinusoidal bias voltages. Due to their extremely high impedance for constant voltage bias, the samples of DNA are excellent insulators; however, their impedances show strong frequency dependence in the range of 10 Hz-7.5 MHz. Favorable response in the gold electrodes is attributed to the higher ability of DNA molecules to bridge the narrower gold electrode gaps in contrast to that in the wider platinum junctions.

Original languageEnglish (US)
Article number201103
JournalJournal of Chemical Physics
Volume128
Issue number20
DOIs
StatePublished - Jun 6 2008

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impedance measurement
Electric Impedance
Gold
deoxyribonucleic acid
gold
Bias voltage
Platinum
DNA
Electrodes
platinum
impedance
Molecules
electrodes
Microelectrodes
electric potential
molecules
insulators

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Hong, S., Jauregui, L. A., Rangel, N. L., Cao, H., Day, B. S., Norton, M. L., ... Seminario, J. M. (2008). Impedance measurements on a DNA junction. Journal of Chemical Physics, 128(20), [201103]. https://doi.org/10.1063/1.2937127

Impedance measurements on a DNA junction. / Hong, Sungmin; Jauregui, Luis A.; Rangel, Norma L.; Cao, Huan; Day, B. Scott; Norton, Michael L.; Sinitskii, Alexander; Seminario, Jorge M.

In: Journal of Chemical Physics, Vol. 128, No. 20, 201103, 06.06.2008.

Research output: Contribution to journalArticle

Hong, S, Jauregui, LA, Rangel, NL, Cao, H, Day, BS, Norton, ML, Sinitskii, A & Seminario, JM 2008, 'Impedance measurements on a DNA junction', Journal of Chemical Physics, vol. 128, no. 20, 201103. https://doi.org/10.1063/1.2937127
Hong S, Jauregui LA, Rangel NL, Cao H, Day BS, Norton ML et al. Impedance measurements on a DNA junction. Journal of Chemical Physics. 2008 Jun 6;128(20). 201103. https://doi.org/10.1063/1.2937127
Hong, Sungmin ; Jauregui, Luis A. ; Rangel, Norma L. ; Cao, Huan ; Day, B. Scott ; Norton, Michael L. ; Sinitskii, Alexander ; Seminario, Jorge M. / Impedance measurements on a DNA junction. In: Journal of Chemical Physics. 2008 ; Vol. 128, No. 20.
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