Ordered Arrays of Gold Nanoparticles Crosslinked by Dithioacetate Linkers for Molecular devices
Abstract
The final performance of a molecular electronic device is determined by the chemical structure of the molecular wires used in its assembly. Molecular place-exchange was used to incorporate di-thioacetate terminated molecules into ordered arrays of dodecanethiol capped gold nanoparticles. X-ray photoelectron spectroscopy confirmed successful molecular replacement. Room-temperature molecular conductance of a statistically large number of devices reveals that conductance is enhanced by up to two orders of magnitude for the di-thioacetate terminated molecules. Density functional theory transport calculations were performed on five different configurations of the di-thioacetate molecules between gold electrodes, and the calculated average conductance values are in good agreement with the conductance experimentally-observed trend. Our findings highlight important cooperative effects of bridging neighboring gold nanoparticles and choice of appropriate molecular wires when designing devices for efficient transport.
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Cite
@article{arxiv.2301.05654,
title = {Ordered Arrays of Gold Nanoparticles Crosslinked by Dithioacetate Linkers for Molecular devices},
author = {Maryana Asaad and Andrea. Vezzoli and Abdalghani Daaoub and Joanna Borowiec and Eugenia Pyurbeeva and Hatef Sadeghi and Sara Sangtarash and Simon J. Higgins and Jan. A. Mol},
journal= {arXiv preprint arXiv:2301.05654},
year = {2023}
}