Abstract
AbstractThe creation of molecular components for use as electronic devices has made enormous progress. In order to advance the field further toward realistic electronic concepts, methods for the controlled modification of the conducting properties of the molecules contacted by metallic electrodes need to be further developed. Here a comprehensive study of charge transport in a class of molecules that allows modifications by introducing metal centers into organic structures is presented. Single molecules are electrically contacted and characterized in order to understand the role of the metal centers in the conductance mechanism through the molecular junctions. It is shown that the presence of single metal ions modifies the energy levels and the coupling of the molecules to the electrical contacts, and that these modifications lead to systematic variations in the statistical behavior of transport properties of the molecular junctions. A rigorous statistical analysis of thousands of junctions is performed to reveal this correlation. The understanding of the role of the metal ion in the resulting conductance properties is an essential step toward the development of molecular electronic circuits.
Highlights
The creation of molecular components for use as electronic devices has made nisms
We show that the combined information extracted from both characterization methods leads to a consistent picture of the variations induced by the different metal centers
We conclude from the characterization of the Empty molecule that conductance without the presence of the metal ions cannot be distinguished from the conductance through the solvent in the stretching curves
Summary
The conductance values of the molecular components in the linear regime[21] are investigated by using histograms of stretching curves (Figure 2). A plot illustrating this search in the parameter space is given in the Supporting Information From these calculations we conclude that for the www.advelectronicmat.de curves with high GOF (GOF > 0.99), the starting values can be varied up to a factor of 10 times smaller or larger without changes in the solution. This behavior is similar to that of the Empty molecule, which, shows a larger number of contacts toward higher transmission values of the lower branch, while the main number of curves for the Co and Fe compounds is found uniformly distributed. We further see higher values for the other two compounds, around 0.68 eV for Fe and 0.73 eV for Co
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
