Near-perfect conduction through a ferrocene-based molecular wire
  Here we describe the design, single-molecule transport measurements, and theoretical modeling of a ferrocene-based organometallic molecular wire, whose bias-dependent conductance shows a clear Lorentzian form with magnitude exceeding 70% of the conductance quantum G_0. We attribute this unprecedented level of single-molecule conductance to a manifestation of the low-lying molecular resonance and extended orbital network long-predicted for a conjugated organic system. A similar-in-length, all-organic conjugated phenylethynyl oligomer molecular framework shows much lower conductance. 
Stephanie A. Getty (1), Chaiwat Engtrakul (2), Lixin Wang (2), Rui Liu   (3), San-Huang Ke (3 and 4), Harold U. Baranger (4)...