Nanoelectrode devices for single-molecule transport measurements have been fabricated using different techniques. They notably differ in the way the nanogap or the molecular junction is created.
Using the mechanically controlled break junction technique (MCBJ) the charge transport of a single ruthenium (II) atom clamped by two terpyridine hinges was investigated. The current-voltage (I-V)-characteristics through a single [Ru(tpy)2](PF6)2 molecule were acquired under ultra-high vacuum (UHV) conditions at various temperatures. DFT-simulations show that the Cardan-joint structural element of the molecule controls the magnitude of the current.