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Issue 3, 2021
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Polarizability is a key parameter for molecular electronics

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Abstract

Identifying descriptors that govern charge transport in molecular electronics is of prime importance for the elaboration of devices. The effects of molecule characteristics, such as size, bulkiness or charge, have been widely reported. Herein, we show that the molecule polarizability can be a crucial parameter to consider. To this end, platinum nanoparticle self-assemblies (PtNP SAs) are synthesized in solution, including a series of polyoxometalates (POMs). The charge of the POM unit can be modified according to the nature of the central heteroatom while keeping its size constant. POM hybrids that display remote terminal thiol functions strongly anchor the PtNP surface to form robust SAs. IV curves, recorded by conductive AFM, show a decrease in Coulomb blockade as the dielectric constant of the POMs increases. In this system, charge transport across molecular junctions can be interpreted as variations in polarizability, which is directly related to the dielectric constant.

Graphical abstract: Polarizability is a key parameter for molecular electronics

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Article information


Submitted
02 Oct 2020
Accepted
13 Jan 2021
First published
18 Jan 2021

Nanoscale Horiz., 2021,6, 271-276
Article type
Communication

Polarizability is a key parameter for molecular electronics

A. Gillet, S. Cher, M. Tassé, T. Blon, S. Alves, G. Izzet, B. Chaudret, A. Proust, P. Demont, F. Volatron and S. Tricard, Nanoscale Horiz., 2021, 6, 271
DOI: 10.1039/D0NH00583E

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