상세정보
학술지
Measurement of Electrical Transport along Stretched λ-DNA Molecules Using the Four-Probe Method
- 발행일
- 201109
- 출처
- Current Applied Physics, v.11 no.5, pp.1197-1200
- ISSN
- 1567-1739
- 출판사
- Elsevier
- 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.
- KSP 제안 키워드
- DNA molecule, Electrical conductance, Electrical transport, Electron Transport, Four-probe method, Ion transport, Relative Humidity, Water layers