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Single adatom dynamics at monatomic steps of free-standing few-layer reduced graphene

Steps and their associated adatoms extensively exist and play prominent roles in affecting surface properties of materials. Such impacts should be especially pronounced in two-dimensional, atomically-thin membranes like graphene. However, how single adatom behaves at monatomic steps of few-layer gra...

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Autores principales: Chang, Haixin, Saito, Mitsuhiro, Nagai, Takuro, Liang, Yunye, Kawazoe, Yoshiyuki, Wang, Zhongchang, Wu, Hongkai, Kimoto, Koji, Ikuhara, Yuichi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4129415/
https://www.ncbi.nlm.nih.gov/pubmed/25113125
http://dx.doi.org/10.1038/srep06037
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author Chang, Haixin
Saito, Mitsuhiro
Nagai, Takuro
Liang, Yunye
Kawazoe, Yoshiyuki
Wang, Zhongchang
Wu, Hongkai
Kimoto, Koji
Ikuhara, Yuichi
author_facet Chang, Haixin
Saito, Mitsuhiro
Nagai, Takuro
Liang, Yunye
Kawazoe, Yoshiyuki
Wang, Zhongchang
Wu, Hongkai
Kimoto, Koji
Ikuhara, Yuichi
author_sort Chang, Haixin
collection PubMed
description Steps and their associated adatoms extensively exist and play prominent roles in affecting surface properties of materials. Such impacts should be especially pronounced in two-dimensional, atomically-thin membranes like graphene. However, how single adatom behaves at monatomic steps of few-layer graphene is still illusive. Here, we report dynamics of individual adatom at monatomic steps of free-standing few-layer reduced graphene under the electron beam radiations, and demonstrate the prevalent existence of monatomic steps even down to unexpectedly ultrasmall lateral size of a circular diameter of ~5 Å. Single adatom prefers to stay at the edges of the atomic steps of few-layer reduced graphene and evolve with the steps. Moreover, we also find that how the single adatom behaves at atomic step edges can be remarkably influenced by the type of adatoms and step edges. Such single adatoms at monatomic steps and ultrasmall atomic steps open up a new window for surface physics and chemistry for graphene-based as well as other two-dimensional materials.
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spelling pubmed-41294152014-08-14 Single adatom dynamics at monatomic steps of free-standing few-layer reduced graphene Chang, Haixin Saito, Mitsuhiro Nagai, Takuro Liang, Yunye Kawazoe, Yoshiyuki Wang, Zhongchang Wu, Hongkai Kimoto, Koji Ikuhara, Yuichi Sci Rep Article Steps and their associated adatoms extensively exist and play prominent roles in affecting surface properties of materials. Such impacts should be especially pronounced in two-dimensional, atomically-thin membranes like graphene. However, how single adatom behaves at monatomic steps of few-layer graphene is still illusive. Here, we report dynamics of individual adatom at monatomic steps of free-standing few-layer reduced graphene under the electron beam radiations, and demonstrate the prevalent existence of monatomic steps even down to unexpectedly ultrasmall lateral size of a circular diameter of ~5 Å. Single adatom prefers to stay at the edges of the atomic steps of few-layer reduced graphene and evolve with the steps. Moreover, we also find that how the single adatom behaves at atomic step edges can be remarkably influenced by the type of adatoms and step edges. Such single adatoms at monatomic steps and ultrasmall atomic steps open up a new window for surface physics and chemistry for graphene-based as well as other two-dimensional materials. Nature Publishing Group 2014-08-12 /pmc/articles/PMC4129415/ /pubmed/25113125 http://dx.doi.org/10.1038/srep06037 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 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 in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/
spellingShingle Article
Chang, Haixin
Saito, Mitsuhiro
Nagai, Takuro
Liang, Yunye
Kawazoe, Yoshiyuki
Wang, Zhongchang
Wu, Hongkai
Kimoto, Koji
Ikuhara, Yuichi
Single adatom dynamics at monatomic steps of free-standing few-layer reduced graphene
title Single adatom dynamics at monatomic steps of free-standing few-layer reduced graphene
title_full Single adatom dynamics at monatomic steps of free-standing few-layer reduced graphene
title_fullStr Single adatom dynamics at monatomic steps of free-standing few-layer reduced graphene
title_full_unstemmed Single adatom dynamics at monatomic steps of free-standing few-layer reduced graphene
title_short Single adatom dynamics at monatomic steps of free-standing few-layer reduced graphene
title_sort single adatom dynamics at monatomic steps of free-standing few-layer reduced graphene
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4129415/
https://www.ncbi.nlm.nih.gov/pubmed/25113125
http://dx.doi.org/10.1038/srep06037
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