Humidity effects on the conductance of the assembly of DNA molecules

Dong Han Ha; Hyunsoo Nham; Kyung Hwa Yoo; Hye Mi So; Hae Yeon Lee; Tomoji Kawai

doi:10.1016/S0009-2614(02)00142-2

Humidity effects on the conductance of the assembly of DNA molecules

Dong Han Ha, Hyunsoo Nham, Kyung Hwa Yoo, Hye Mi So, Hae Yeon Lee, Tomoji Kawai

Department of Physics

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60 Citations (Scopus)

Abstract

We have studied the effects of relative humidity on the conductance of the assembly of poly(dG)-poly(dC) and poly(dA)-poly(dT) DNA molecules. The exponential dependence of conductance on the relative humidity is observed and explained in terms of ionic conduction through the hydration layers around DNA. The poly(dG)-poly(dC) specimen has larger sensitivity to the relative humidity and smaller activation energy for the ionic conduction than the poly(dA)-poly(dT) specimen. Our results show that the conductance of a specimen consisting of multiple DNA molecules might be strongly affected by the relative humidity.

Original language	English
Pages (from-to)	405-409
Number of pages	5
Journal	Chemical Physics Letters
Volume	355
Issue number	5-6
DOIs	https://doi.org/10.1016/S0009-2614(02)00142-2
Publication status	Published - 2002 Apr 8

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All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

Cite this

Ha, D. H., Nham, H., Yoo, K. H., So, H. M., Lee, H. Y., & Kawai, T. (2002). Humidity effects on the conductance of the assembly of DNA molecules. Chemical Physics Letters, 355(5-6), 405-409. https://doi.org/10.1016/S0009-2614(02)00142-2

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AU - Nham, Hyunsoo

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AU - Kawai, Tomoji

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AB - We have studied the effects of relative humidity on the conductance of the assembly of poly(dG)-poly(dC) and poly(dA)-poly(dT) DNA molecules. The exponential dependence of conductance on the relative humidity is observed and explained in terms of ionic conduction through the hydration layers around DNA. The poly(dG)-poly(dC) specimen has larger sensitivity to the relative humidity and smaller activation energy for the ionic conduction than the poly(dA)-poly(dT) specimen. Our results show that the conductance of a specimen consisting of multiple DNA molecules might be strongly affected by the relative humidity.

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10.1016/S0009-2614(02)00142-2