39 research outputs found
Conductance behavior of tetraphenyl-Aza-Bodipys
We studied the electrical conductance of single-molecule junctions formed from molecular wires with four anchor groups. Three tetraphenyl-aza-BODIPYs with four or two thiomethyl anchor groups were synthesized, and their single-molecule conductance was measured using break-junction-STM. Using DFT based calculations these compounds were shown to display a combination of a high and low conductance, depending on the molecule's connectivity in the junction. A scissor correction is employed to obtain the corrected HOMO-LUMO gaps and a tight binding model (TBM) is used to highlight the role of transport through the pi system of the tetraphenyl-aza-BODIPY central unit. The three higher-conductance geometries follow the sequence 3 > 4 > 2, which demonstrates that their conductances are correlated with the number of anchors
Identificação e avaliação de variáveis críticas no processo de produção da cana-de-açúcar
Recommended from our members
Bright AGN Source List from the First Three Months of the Fermi Large Area Telescope All-Sky Survey
Thermalstabilization of chitinolytic enzymes of Pantoea dispersa
Original articles can be found at: http://www.sciencedirect.com/science/journal/1369703X Copyright Elsevier B.V. DOI : 10.1016/j.bej.2007.01.009Peer reviewe
Dirac equation in the octonionic algebra
Consiglio Nazionale delle Ricerche - Biblioteca Centrale - P.le Aldo Moro, 7 Rome / CNR - Consiglio Nazionale delle RichercheSIGLEITItal
Regular functions of biquaternionic variables and Maxwell's equations
Consiglio Nazionale delle Ricerche - Biblioteca Centrale - P.le Aldo Moro, 7, Rome / CNR - Consiglio Nazionale delle RichercheSIGLEITItal
Recommended from our members
Electrochemical single-molecule transistors with optimized gate coupling
Electrochemical gating at the single molecule level
of viologen molecular bridges in ionic liquids is examined. Contrary to previous data recorded in aqueous electrolytes, a clear and sharp peak in the single molecule conductance versus electrochemical
potential data is obtained in ionic liquids. These data
are rationalized in terms of a two-step electrochemical model for charge transport across the redox bridge. In this model the gate coupling in the ionic liquid is found to be fully effective with a modeled gate coupling parameter, ξ, of unity. This compares to a much lower gate coupling parameter of 0.2 for the equivalent
aqueous gating system. This study shows that ionic liquids are far more effective media for gating the conductance of single molecules than either solid-state three-terminal platforms created using nanolithography, or aqueous media