Premium
Sequence‐Dependent Photocurrent Generation through Long‐Distance Excess‐Electron Transfer in DNA
Author(s) -
Lin ShihHsun,
Fujitsuka Mamoru,
Majima Tetsuro
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201602850
Subject(s) - photocurrent , stacking , electron transfer , nucleobase , dna , materials science , base pair , dna sequencing , anode , chemistry , electrode , photochemistry , optoelectronics , biochemistry , organic chemistry
Abstract Given its well‐ordered continuous π stacking of nucleobases, DNA has been considered as a biomaterial for charge transfer in biosensors. For cathodic photocurrent generation resulting from hole transfer in DNA, sensitivity to DNA structure and base‐pair stacking has been confirmed. However, such information has not been provided for anodic photocurrent generation resulting from excess‐electron transfer in DNA. In the present study, we measured the anodic photocurrent of a DNA‐modified Au electrode. Our results demonstrate long‐distance excess‐electron transfer in DNA, which is dominated by a hopping mechanism, and the photocurrent generation is sequence dependent.