Control over Rectification in Supramolecular Tunneling Junctions

摘要

We report herein the concept of using a supramolecular platform on which dendrimers can be immobilized to result in tunneling junctions formed from assemblies with well-defined structures. In this way, the rectification can be controlled by changing only the chemical structure of the termini of the dendrimers, while minimizing the changes of the whole supramolecular assemblies. This method makes it possible to perform physical organic studies of charge transport across self-assembled monolayer (SAM)-based junctions. These junctions were fabricated by using ultraflat template-stripped Au bottom electrodes (Au~(TS)) and liquid-metal top electrodes of an eutectic Ga-In (EGaln) alloy with a superficial layer of Ga2O3.