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Controlling avalanche criticality in 2D nano arrays
Many physical systems respond to slowly changing external force through avalanches spanning broad range of sizes. Some systems crackle even without apparent external force, such as bursts of neuronal activity or charge transfer avalanches in 2D molecular layers. Advanced development of theoretical m...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3654552/ https://www.ncbi.nlm.nih.gov/pubmed/23677142 http://dx.doi.org/10.1038/srep01845 |
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author | Zohar, Y. C. Yochelis, S. Dahmen, K. A. Jung, G. Paltiel, Y. |
author_facet | Zohar, Y. C. Yochelis, S. Dahmen, K. A. Jung, G. Paltiel, Y. |
author_sort | Zohar, Y. C. |
collection | PubMed |
description | Many physical systems respond to slowly changing external force through avalanches spanning broad range of sizes. Some systems crackle even without apparent external force, such as bursts of neuronal activity or charge transfer avalanches in 2D molecular layers. Advanced development of theoretical models describing disorder-induced critical phenomena calls for experiments probing the dynamics upon tuneable disorder. Here we show that isomeric structural transitions in 2D organic self-assembled monolayer (SAM) exhibit critical dynamics with experimentally tuneable disorder. The system consists of field effect transistor coupled through SAM to illuminated semiconducting nanocrystals (NCs). Charges photoinduced in NCs are transferred through SAM to the transistor surface and modulate its conductivity. Avalanches of isomeric structural transitions are revealed by measuring the current noise I(t) of the transistor. Accumulated surface traps charges reduce dipole moments of the molecules, decrease their coupling, and thus decrease the critical disorder of the SAM enabling its tuning during experiments. |
format | Online Article Text |
id | pubmed-3654552 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-36545522013-05-20 Controlling avalanche criticality in 2D nano arrays Zohar, Y. C. Yochelis, S. Dahmen, K. A. Jung, G. Paltiel, Y. Sci Rep Article Many physical systems respond to slowly changing external force through avalanches spanning broad range of sizes. Some systems crackle even without apparent external force, such as bursts of neuronal activity or charge transfer avalanches in 2D molecular layers. Advanced development of theoretical models describing disorder-induced critical phenomena calls for experiments probing the dynamics upon tuneable disorder. Here we show that isomeric structural transitions in 2D organic self-assembled monolayer (SAM) exhibit critical dynamics with experimentally tuneable disorder. The system consists of field effect transistor coupled through SAM to illuminated semiconducting nanocrystals (NCs). Charges photoinduced in NCs are transferred through SAM to the transistor surface and modulate its conductivity. Avalanches of isomeric structural transitions are revealed by measuring the current noise I(t) of the transistor. Accumulated surface traps charges reduce dipole moments of the molecules, decrease their coupling, and thus decrease the critical disorder of the SAM enabling its tuning during experiments. Nature Publishing Group 2013-05-15 /pmc/articles/PMC3654552/ /pubmed/23677142 http://dx.doi.org/10.1038/srep01845 Text en Copyright © 2013, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/ |
spellingShingle | Article Zohar, Y. C. Yochelis, S. Dahmen, K. A. Jung, G. Paltiel, Y. Controlling avalanche criticality in 2D nano arrays |
title | Controlling avalanche criticality in 2D nano arrays |
title_full | Controlling avalanche criticality in 2D nano arrays |
title_fullStr | Controlling avalanche criticality in 2D nano arrays |
title_full_unstemmed | Controlling avalanche criticality in 2D nano arrays |
title_short | Controlling avalanche criticality in 2D nano arrays |
title_sort | controlling avalanche criticality in 2d nano arrays |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3654552/ https://www.ncbi.nlm.nih.gov/pubmed/23677142 http://dx.doi.org/10.1038/srep01845 |
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