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Article Dans Une Revue Journal of Applied Physics Année : 2014

Tuning the thickness of electrochemically grafted layers in large area molecular junctions

Résumé

We have investigated the thickness, the morphology and the transport properties of oligo(1-(2-bisthienyl)benzene) (BTB) thin films grafted on evaporated Au electrodes thanks to a diazonium-based electro-reduction process. Atomic force microscope (AFM) measurements reveal that the thickness is accurately controlled by the number of electrochemical cycles in the 2-27 nm range. The thickness displays a linear dependence with the number of cycles followed by a saturation. Ultrathin (2 nm) and thin (27 nm) large area molecular junctions have then been fabricated. The current-voltage characteristics is fully consistent with a tunneling barrier model whereas for thicker molecular films a rectifying behavior is observed.
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Dates et versions

hal-01822392 , version 1 (06-07-2018)

Identifiants

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T Fluteau, C. Bessis, C. Barraud, M. L. Della Rocca, P. Martin, et al.. Tuning the thickness of electrochemically grafted layers in large area molecular junctions. Journal of Applied Physics, 2014, 116 (11), pp.114509. ⟨10.1063/1.4896106⟩. ⟨hal-01822392⟩
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