title: Single molecule conductance, thermopower, and transition voltage.
abstract: We have measured the thermopower as well as other important charge transport quantities, including conductance, current-voltage characteristics, and transition voltage of single molecules. The thermopower has little correlation with the conductance, but it decreases with the transition voltage, which is consistent with a theory based on Landauer's formula. Since the transition voltage reflects the molecular energy level alignment, our finding also shows that the thermopower provides valuable information about the relative alignment between the molecular energy levels and the electrodes' Fermi energy level.
authors.affiliation: Center for Bioelectronics and Biosensors, Biodesign Institute, and Department of Electrical Engineering, Arizona State University , Tempe, Arizona 85287, United States.
authors.forename: Shaoyin
authors.initials: S
authors.lastname: Guo
authors.forename: Gang
authors.initials: G
authors.lastname: Zhou
authors.forename: Nongjian
authors.initials: N
authors.lastname: Tao
mesh_terms: D004553:Electric Conductivity; D004735:Energy Transfer; D036103:Nanotechnology; D013816:Thermodynamics