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Ambipolar Charge Transport in DNA Molecules
Author(s) -
Roy V. A. L.,
Wong Ella LaiMing,
Ko Ben ChiBun,
Chao ChienTu,
Yan SiuCheong,
Yan Beiping,
Wu JongChing,
Che ChiMing
Publication year - 2008
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200701179
Subject(s) - ambipolar diffusion , materials science , molecule , dna , trapping , electrode , electric field , field effect transistor , charge (physics) , chemical physics , nanotechnology , field effect , transistor , optoelectronics , electrical engineering , electron , chemistry , voltage , biochemistry , biology , physics , engineering , ecology , organic chemistry , quantum mechanics
The electrical transport properties of DNA films in field‐effect transistor structure are analyzed. As‐depositedfilms did not show electrical conductivity; no DNA network wasobserved between the DNA moleculesbridging the electrodes. When the DNA molecules were stretchedinto a thin film an interpenetratingnetwork formed, and the devicesshowed pronounced field‐effects withambipolar behavior. Devices producedby electrostatic trapping of DNA molecules exhibited large bulk parallelcurrents and relatively small field effects.