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In-Situ Stretching Patterned Graphene Nanoribbons in the Transmission Electron Microscope

The mechanical response of patterned graphene nanoribbons (GNRs) with a width less than 100 nm was studied in-situ using quantitative tensile testing in a transmission electron microscope (TEM). A high degree of crystallinity was confirmed for patterned nanoribbons before and after the in-situ exper...

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Autores principales: Liao, Zhongquan, Medrano Sandonas, Leonardo, Zhang, Tao, Gall, Martin, Dianat, Arezoo, Gutierrez, Rafael, Mühle, Uwe, Gluch, Jürgen, Jordan, Rainer, Cuniberti, Gianaurelio, Zschech, Ehrenfried
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5428052/
https://www.ncbi.nlm.nih.gov/pubmed/28303001
http://dx.doi.org/10.1038/s41598-017-00227-3
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author Liao, Zhongquan
Medrano Sandonas, Leonardo
Zhang, Tao
Gall, Martin
Dianat, Arezoo
Gutierrez, Rafael
Mühle, Uwe
Gluch, Jürgen
Jordan, Rainer
Cuniberti, Gianaurelio
Zschech, Ehrenfried
author_facet Liao, Zhongquan
Medrano Sandonas, Leonardo
Zhang, Tao
Gall, Martin
Dianat, Arezoo
Gutierrez, Rafael
Mühle, Uwe
Gluch, Jürgen
Jordan, Rainer
Cuniberti, Gianaurelio
Zschech, Ehrenfried
author_sort Liao, Zhongquan
collection PubMed
description The mechanical response of patterned graphene nanoribbons (GNRs) with a width less than 100 nm was studied in-situ using quantitative tensile testing in a transmission electron microscope (TEM). A high degree of crystallinity was confirmed for patterned nanoribbons before and after the in-situ experiment by selected area electron diffraction (SAED) patterns. However, the maximum local true strain of the nanoribbons was determined to be only about 3%. The simultaneously recorded low-loss electron energy loss spectrum (EELS) on the stretched nanoribbons did not reveal any bandgap opening. Density Functional Based Tight Binding (DFTB) simulation was conducted to predict a feasible bandgap opening as a function of width in GNRs at low strain. The bandgap of unstrained armchair graphene nanoribbons (AGNRs) vanished for a width of about 14.75 nm, and this critical width was reduced to 11.21 nm for a strain level of 2.2%. The measured low tensile failure strain may limit the practical capability of tuning the bandgap of patterned graphene nanostructures by strain engineering, and therefore, it should be considered in bandgap design for graphene-based electronic devices by strain engineering.
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spelling pubmed-54280522017-05-15 In-Situ Stretching Patterned Graphene Nanoribbons in the Transmission Electron Microscope Liao, Zhongquan Medrano Sandonas, Leonardo Zhang, Tao Gall, Martin Dianat, Arezoo Gutierrez, Rafael Mühle, Uwe Gluch, Jürgen Jordan, Rainer Cuniberti, Gianaurelio Zschech, Ehrenfried Sci Rep Article The mechanical response of patterned graphene nanoribbons (GNRs) with a width less than 100 nm was studied in-situ using quantitative tensile testing in a transmission electron microscope (TEM). A high degree of crystallinity was confirmed for patterned nanoribbons before and after the in-situ experiment by selected area electron diffraction (SAED) patterns. However, the maximum local true strain of the nanoribbons was determined to be only about 3%. The simultaneously recorded low-loss electron energy loss spectrum (EELS) on the stretched nanoribbons did not reveal any bandgap opening. Density Functional Based Tight Binding (DFTB) simulation was conducted to predict a feasible bandgap opening as a function of width in GNRs at low strain. The bandgap of unstrained armchair graphene nanoribbons (AGNRs) vanished for a width of about 14.75 nm, and this critical width was reduced to 11.21 nm for a strain level of 2.2%. The measured low tensile failure strain may limit the practical capability of tuning the bandgap of patterned graphene nanostructures by strain engineering, and therefore, it should be considered in bandgap design for graphene-based electronic devices by strain engineering. Nature Publishing Group UK 2017-03-16 /pmc/articles/PMC5428052/ /pubmed/28303001 http://dx.doi.org/10.1038/s41598-017-00227-3 Text en © The Author(s) 2017 This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Liao, Zhongquan
Medrano Sandonas, Leonardo
Zhang, Tao
Gall, Martin
Dianat, Arezoo
Gutierrez, Rafael
Mühle, Uwe
Gluch, Jürgen
Jordan, Rainer
Cuniberti, Gianaurelio
Zschech, Ehrenfried
In-Situ Stretching Patterned Graphene Nanoribbons in the Transmission Electron Microscope
title In-Situ Stretching Patterned Graphene Nanoribbons in the Transmission Electron Microscope
title_full In-Situ Stretching Patterned Graphene Nanoribbons in the Transmission Electron Microscope
title_fullStr In-Situ Stretching Patterned Graphene Nanoribbons in the Transmission Electron Microscope
title_full_unstemmed In-Situ Stretching Patterned Graphene Nanoribbons in the Transmission Electron Microscope
title_short In-Situ Stretching Patterned Graphene Nanoribbons in the Transmission Electron Microscope
title_sort in-situ stretching patterned graphene nanoribbons in the transmission electron microscope
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5428052/
https://www.ncbi.nlm.nih.gov/pubmed/28303001
http://dx.doi.org/10.1038/s41598-017-00227-3
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