Atomically wired molecular junctions: Connecting a single organic molecule by chains of metal atoms

Abstract

Using a break junction technique, we find a clear signature for the formation of conducting hybrid junctions composed of a single organic molecule (benzene, naphthalene or anthracene) connected to chains of platinum atoms. The hybrid junctions exhibit metallic-like conductance (~0.1-1G0), which is rather insensitive to further elongation by additional atoms. At low bias voltage the hybrid junctions can be elongated significantly beyond the length of the bare atomic chains. Ab initio calculations reveal that benzene based hybrid junctions have a significant binding energy and high structural flexibility that may contribute to the survival of the hybrid junction during the elongation process. The fabrication of hybrid junctions opens the way for combining the different properties of atomic chains and organic molecules to realize a new class of atomic scale interfaces.

References in corpus (6)

• Single-Molecule Circuits with Well-Defined Molecular Conductance
• Highly conductive molecular junctions based on direct binding of benzene to platinum electrodes
• Kondo resonances and anomalous gate dependence of electronic conduction in single-molecule transistors
• The transfer of energy between electrons and ions in solids
• Stabilizing single atom contacts by molecular bridge formation
• Mechanical properties of Pt monatomic chains