Estimating single molecule conductance from spontaneous evolution of a molecular contact

Abstract : 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 (MCBJ) operated at room temperature in 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 con-ductance 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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Pré-publication, Document de travail
2017
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Soumis le : mercredi 13 septembre 2017 - 11:19:44
Dernière modification le : jeudi 14 septembre 2017 - 01:07:10

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M Gil, T Malinowski, M Iazykov, Hubert Klein. Estimating single molecule conductance from spontaneous evolution of a molecular contact. 2017. 〈hal-01586755〉

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