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학술지 Measurement of Electrical Transport along Stretched λ-DNA Molecules Using the Four-Probe Method
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저자
윤용주, 유한영, 하동한
발행일
201109
출처
Current Applied Physics, v.11 no.5, pp.1197-1200
ISSN
1567-1739
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.cap.2011.02.019
협약과제
11MC1500, 차세대 IT기반 기술사업화 기반조성, 장원익
초록
We have measured the electrical transport along individual {\\lambda}-DNA molecules stretched across a set of parallel nanoelectrodes using the four-probe method. Up to a relative humidity (RH) of 78%, we find no evidence for electrical transport along {\\lambda}-DNAs. However, for RHs above 79%, we measure considerable current. The electrical conductance of {\\lambda}-DNA increases exponentially with increasing RH. For a long {\\lambda}-DNA molecule with a random base sequence, our results indicate that the current flows through dense water layers surrounding DNA and is dominated by ion transport rather than by electron transport through {\\lambda}-DNA itself. © 2011 Elsevier B.V. All rights reserved.
키워드
Conductance, DNA, Four-probe measurement, Humidity
KSP 제안 키워드
DNA molecule, Electrical conductance, Electrical transport, Electron Transport, Four-probe method, Ion transport, Relative Humidity, Water layers, four-probe measurement