We present an original method to estimate the conductivity of a single molecule anchored to nanometric-sized metallic electrodes, using a Mechanically Controlled Break Junction operated at room temperature in the liquid. We record the conductance through the metal/molecules/metal nanocontact while keeping the metallic electrodes at a fixed distance. Taking advantage of thermal diffusion and electromigration, we let the contact naturally explore the more stable configurations around a chosen conductance value. The conductance of a single molecule is estimated from a statistical analysis of raw conductance and conductance standard deviation data for molecular contacts containing up to 14 molecules. The single molecule conductance values are interpreted as time-averaged conductance of an ensemble of conformers at thermal equilibrium.
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Research Article| March 13 2018
Estimating single molecule conductance from spontaneous evolution of a molecular contact
M. Gil, T. Malinowski, M. Iazykov, H. R. Klein; Estimating single molecule conductance from spontaneous evolution of a molecular contact. J. Appl. Phys. 14 March 2018; 123 (10): 104303. https://doi.org/10.1063/1.5018252
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