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Folding a Single-Molecule Junction
[Image: see text] Stimuli-responsive molecular junctions, where the conductance can be altered by an external perturbation, are an important class of nanoelectronic devices. These have recently attracted interest as large effects can be introduced through exploitation of quantum phenomena. We show h...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7662913/ https://www.ncbi.nlm.nih.gov/pubmed/33047599 http://dx.doi.org/10.1021/acs.nanolett.0c02815 |
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author | Wu, Chuanli Bates, Demetris Sangtarash, Sara Ferri, Nicoló Thomas, Aidan Higgins, Simon J. Robertson, Craig M. Nichols, Richard J. Sadeghi, Hatef Vezzoli, Andrea |
author_facet | Wu, Chuanli Bates, Demetris Sangtarash, Sara Ferri, Nicoló Thomas, Aidan Higgins, Simon J. Robertson, Craig M. Nichols, Richard J. Sadeghi, Hatef Vezzoli, Andrea |
author_sort | Wu, Chuanli |
collection | PubMed |
description | [Image: see text] Stimuli-responsive molecular junctions, where the conductance can be altered by an external perturbation, are an important class of nanoelectronic devices. These have recently attracted interest as large effects can be introduced through exploitation of quantum phenomena. We show here that significant changes in conductance can be attained as a molecule is repeatedly compressed and relaxed, resulting in molecular folding along a flexible fragment and cycling between an anti and a syn conformation. Power spectral density analysis and DFT transport calculations show that through-space tunneling between two phenyl fragments is responsible for the conductance increase as the molecule is mechanically folded to the syn conformation. This phenomenon represents a novel class of mechanoresistive molecular devices, where the functional moiety is embedded in the conductive backbone and exploits intramolecular nonbonding interactions, in contrast to most studies where mechanoresistivity arises from changes in the molecule–electrode interface. |
format | Online Article Text |
id | pubmed-7662913 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-76629132020-11-13 Folding a Single-Molecule Junction Wu, Chuanli Bates, Demetris Sangtarash, Sara Ferri, Nicoló Thomas, Aidan Higgins, Simon J. Robertson, Craig M. Nichols, Richard J. Sadeghi, Hatef Vezzoli, Andrea Nano Lett [Image: see text] Stimuli-responsive molecular junctions, where the conductance can be altered by an external perturbation, are an important class of nanoelectronic devices. These have recently attracted interest as large effects can be introduced through exploitation of quantum phenomena. We show here that significant changes in conductance can be attained as a molecule is repeatedly compressed and relaxed, resulting in molecular folding along a flexible fragment and cycling between an anti and a syn conformation. Power spectral density analysis and DFT transport calculations show that through-space tunneling between two phenyl fragments is responsible for the conductance increase as the molecule is mechanically folded to the syn conformation. This phenomenon represents a novel class of mechanoresistive molecular devices, where the functional moiety is embedded in the conductive backbone and exploits intramolecular nonbonding interactions, in contrast to most studies where mechanoresistivity arises from changes in the molecule–electrode interface. American Chemical Society 2020-10-13 2020-11-11 /pmc/articles/PMC7662913/ /pubmed/33047599 http://dx.doi.org/10.1021/acs.nanolett.0c02815 Text en © 2020 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
spellingShingle | Wu, Chuanli Bates, Demetris Sangtarash, Sara Ferri, Nicoló Thomas, Aidan Higgins, Simon J. Robertson, Craig M. Nichols, Richard J. Sadeghi, Hatef Vezzoli, Andrea Folding a Single-Molecule Junction |
title | Folding a Single-Molecule Junction |
title_full | Folding a Single-Molecule Junction |
title_fullStr | Folding a Single-Molecule Junction |
title_full_unstemmed | Folding a Single-Molecule Junction |
title_short | Folding a Single-Molecule Junction |
title_sort | folding a single-molecule junction |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7662913/ https://www.ncbi.nlm.nih.gov/pubmed/33047599 http://dx.doi.org/10.1021/acs.nanolett.0c02815 |
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