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

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)


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 languageEnglish
Pages (from-to)405-409
Number of pages5
JournalChemical Physics Letters
Issue number5-6
Publication statusPublished - 2002 Apr 8

All Science Journal Classification (ASJC) codes

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


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