Electrical conduction through poly(dA)-poly(dT) and poly(dG)-poly(dC) DNA molecules.
We report direct measurements of electrical transport through poly(dA)-poly(dT) and poly(dG)-poly(dC) DNA molecules containing identical base pairs. The observed experimental results suggest that electrical transport through DNA molecules occurs by polaron hopping. We have also investigated the effect of gate voltage on the current-voltage curve. It demonstrates the possibility of a DNA field-effect transistor operating at room temperature. Moreover, the gate-voltage dependent transport measurements show that poly(dA)-poly(dT) behaves as an n-type semiconductor, whereas poly(dG)-poly(dC) behaves as a p-type semiconductor.
Yoo
K H
KH
Electronic Devices Group, Korea Research Institute of Standards and Science, Yusung, P.O. Box 102, Taejon 305-600, Korea. khyoo@phya.yonsei.ac.kr
Ha
D H
DH
Lee
J O
JO
Park
J W
JW
Kim
J
J
Kim
J J
JJ
Lee
H Y
HY
Kawai
T
T
Choi
H Y
HY
D004247:DNA / Q000737:chemistry*; D004553:Electric Conductivity; D004579:Electron Transport; D011089:Polydeoxyribonucleotides / Q000737:chemistry*; D013696:Temperature
D011089:Polydeoxyribonucleotides; C016681:poly(dG).poly(dC); C084838:polydeoxyadenylic acid-polythymidylic acid; D004247:DNA