title: Thermoelectric effect and its dependence on molecular length and sequence in single DNA molecules.
abstract: Studying the thermoelectric effect in DNA is important for unravelling charge transport mechanisms and for developing relevant applications of DNA molecules. Here we report a study of the thermoelectric effect in single DNA molecules. By varying the molecular length and sequence, we tune the charge transport in DNA to either a hopping- or tunnelling-dominated regimes. The thermoelectric effect is small and insensitive to the molecular length in the hopping regime. In contrast, the thermoelectric effect is large and sensitive to the length in the tunnelling regime. These findings indicate that one may control the thermoelectric effect in DNA by varying its sequence and length. We describe the experimental results in terms of hopping and tunnelling charge transport models.
authors.affiliation: Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-5801, USA.|School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287-5801, USA.
authors.forename: Yueqi
authors.initials: Y
authors.lastname: Li
authors.affiliation: Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-5801, USA.|School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287-5801, USA.
authors.forename: Limin
authors.initials: L
authors.lastname: Xiang
authors.affiliation: Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-5801, USA.|School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287-5801, USA.
authors.forename: Julio L
authors.initials: JL
authors.lastname: Palma
authors.affiliation: Research Center for Computational Design of Advanced Functional Materials (CD-FMat), National Institute of Advanced Industrial Science and Technology (AIST), Central 2, Umezono 1-1-1, Tsukuba, Ibaraki 305-8568, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Asai
authors.affiliation: Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-5801, USA.|School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210093 China.
authors.forename: Nongjian
authors.initials: N
authors.lastname: Tao
mesh_terms: D000465:Algorithms; D001483:Base Sequence; D002942:Circular Dichroism; D004247:DNA / Q000737:chemistry* / Q000378:metabolism; D004553:Electric Conductivity; D004591:Electrophoresis, Polyacrylamide Gel; D008956:Models, Chemical; D008958:Models, Molecular; D009690:Nucleic Acid Conformation; D009691:Nucleic Acid Denaturation; D013696:Temperature; D044366:Transition Temperature
chemical_list: D004247:DNA