Control of topography, stress and diffusion at molecule-metal interface
  Transport properties of metal-molecule-metal junctions containing monolayer of conjugated and saturated molecules with characteristic dimensions in the range of 30-300 nm are correlated with microscopic topography, stress and chemical bonding at metal-molecule interfaces. Our statistically significant dataset allows us to conclude that the conductivity of organic molecules ~1.5 nm long is at least 4 orders of magnitude lower than is commonly believed. 
Nikolai B. Zhitenev, Weirong Jiang, Artur Erbe, Zhenan Bao, Eric   Garfunkel, Donald M. Tennant and Raymond A. Cirelli