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Rotational switches in the two-dimensional fullerene quasicrystal

One of the essential components of molecular electronic circuits are switching elements that are stable in two different states and can ideally be switched on and off many times. Here, distinct buckminsterfullerenes within a self-assembled monolayer, forming a two-dimensional dodecagonal quasicrysta...

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Autores principales: Paßens, M., Karthäuser, S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6302930/
https://www.ncbi.nlm.nih.gov/pubmed/30575582
http://dx.doi.org/10.1107/S2053273318015681
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author Paßens, M.
Karthäuser, S.
author_facet Paßens, M.
Karthäuser, S.
author_sort Paßens, M.
collection PubMed
description One of the essential components of molecular electronic circuits are switching elements that are stable in two different states and can ideally be switched on and off many times. Here, distinct buckminsterfullerenes within a self-assembled monolayer, forming a two-dimensional dodecagonal quasicrystal on a Pt-terminated Pt(3)Ti(111) surface, are identified to form well separated molecular rotational switching elements. Employing scanning tunneling microscopy, the molecular-orbital appearance of the fullerenes in the quasicrystalline monolayer is resolved. Thus, fullerenes adsorbed on the 3(6) vertex configuration are identified to exhibit a distinctly increased mobility. In addition, this finding is verified by differential conductance measurements. The rotation of these mobile fullerenes can be triggered frequently by applied voltage pulses, while keeping the neighboring molecules immobile. An extensive analysis reveals that crystallographic and energetic constraints at the molecule/metal interface induce an inequality of the local potentials for the 3(6) and 3(2).4.3.4 vertex sites and this accounts for the switching ability of fullerenes on the 3(6) vertex sites. Consequently, a local area of the 8/3 approximant in the two-dimensional fullerene quasicrystal consists of single rotational switching fullerenes embedded in a matrix of inert molecules. Furthermore, it is deduced that optimization of the intermolecular interactions between neighboring fullerenes hinders the realization of translational periodicity in the fullerene monolayer on the Pt-terminated Pt(3)Ti(111) surface.
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spelling pubmed-63029302019-01-14 Rotational switches in the two-dimensional fullerene quasicrystal Paßens, M. Karthäuser, S. Acta Crystallogr A Found Adv Research Papers One of the essential components of molecular electronic circuits are switching elements that are stable in two different states and can ideally be switched on and off many times. Here, distinct buckminsterfullerenes within a self-assembled monolayer, forming a two-dimensional dodecagonal quasicrystal on a Pt-terminated Pt(3)Ti(111) surface, are identified to form well separated molecular rotational switching elements. Employing scanning tunneling microscopy, the molecular-orbital appearance of the fullerenes in the quasicrystalline monolayer is resolved. Thus, fullerenes adsorbed on the 3(6) vertex configuration are identified to exhibit a distinctly increased mobility. In addition, this finding is verified by differential conductance measurements. The rotation of these mobile fullerenes can be triggered frequently by applied voltage pulses, while keeping the neighboring molecules immobile. An extensive analysis reveals that crystallographic and energetic constraints at the molecule/metal interface induce an inequality of the local potentials for the 3(6) and 3(2).4.3.4 vertex sites and this accounts for the switching ability of fullerenes on the 3(6) vertex sites. Consequently, a local area of the 8/3 approximant in the two-dimensional fullerene quasicrystal consists of single rotational switching fullerenes embedded in a matrix of inert molecules. Furthermore, it is deduced that optimization of the intermolecular interactions between neighboring fullerenes hinders the realization of translational periodicity in the fullerene monolayer on the Pt-terminated Pt(3)Ti(111) surface. International Union of Crystallography 2019-01-01 /pmc/articles/PMC6302930/ /pubmed/30575582 http://dx.doi.org/10.1107/S2053273318015681 Text en © Paßens and Karthäuser 2019 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.http://creativecommons.org/licenses/by/2.0/uk/
spellingShingle Research Papers
Paßens, M.
Karthäuser, S.
Rotational switches in the two-dimensional fullerene quasicrystal
title Rotational switches in the two-dimensional fullerene quasicrystal
title_full Rotational switches in the two-dimensional fullerene quasicrystal
title_fullStr Rotational switches in the two-dimensional fullerene quasicrystal
title_full_unstemmed Rotational switches in the two-dimensional fullerene quasicrystal
title_short Rotational switches in the two-dimensional fullerene quasicrystal
title_sort rotational switches in the two-dimensional fullerene quasicrystal
topic Research Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6302930/
https://www.ncbi.nlm.nih.gov/pubmed/30575582
http://dx.doi.org/10.1107/S2053273318015681
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