The feature size and functional range of molecular electronic devices

(Xiamen University) The tunneling leakage is a major quantum obstacle which hinders further miniaturization of electronic devices. To explore the miniaturization limits of molecular electronics, the oligo(aryleneethynylene) (OAE) molecules were employed to investigate the transition between through-space tunneling and molecular tunneling. For the shortest OAE molecule, the intrinsic single-molecule charge transport can be outstripped from tunneling leakage at 0.66 nm, suggesting the potential to push the miniaturization limit of molecular electronic devices to the angstrom scale.