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Computational insights and the observation of SiC nanograin assembly: towards 2D silicon carbide
While an increasing number of two-dimensional (2D) materials, including graphene and silicene, have already been realized, others have only been predicted. An interesting example is the two-dimensional form of silicon carbide (2D-SiC). Here, we present an observation of atomically thin and hexagonal...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5493665/ https://www.ncbi.nlm.nih.gov/pubmed/28667311 http://dx.doi.org/10.1038/s41598-017-04683-9 |
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author | Susi, Toma Skákalová, Viera Mittelberger, Andreas Kotrusz, Peter Hulman, Martin Pennycook, Timothy J. Mangler, Clemens Kotakoski, Jani Meyer, Jannik C. |
author_facet | Susi, Toma Skákalová, Viera Mittelberger, Andreas Kotrusz, Peter Hulman, Martin Pennycook, Timothy J. Mangler, Clemens Kotakoski, Jani Meyer, Jannik C. |
author_sort | Susi, Toma |
collection | PubMed |
description | While an increasing number of two-dimensional (2D) materials, including graphene and silicene, have already been realized, others have only been predicted. An interesting example is the two-dimensional form of silicon carbide (2D-SiC). Here, we present an observation of atomically thin and hexagonally bonded nanosized grains of SiC assembling temporarily in graphene oxide pores during an atomic resolution scanning transmission electron microscopy experiment. Even though these small grains do not fully represent the bulk crystal, simulations indicate that their electronic structure already approaches that of 2D-SiC. This is predicted to be flat, but some doubts have remained regarding the preference of Si for sp (3) hybridization. Exploring a number of corrugated morphologies, we find completely flat 2D-SiC to have the lowest energy. We further compute its phonon dispersion, with a Raman-active transverse optical mode, and estimate the core level binding energies. Finally, we study the chemical reactivity of 2D-SiC, suggesting it is like silicene unstable against molecular absorption or interlayer linking. Nonetheless, it can form stable van der Waals-bonded bilayers with either graphene or hexagonal boron nitride, promising to further enrich the family of two-dimensional materials once bulk synthesis is achieved. |
format | Online Article Text |
id | pubmed-5493665 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-54936652017-07-05 Computational insights and the observation of SiC nanograin assembly: towards 2D silicon carbide Susi, Toma Skákalová, Viera Mittelberger, Andreas Kotrusz, Peter Hulman, Martin Pennycook, Timothy J. Mangler, Clemens Kotakoski, Jani Meyer, Jannik C. Sci Rep Article While an increasing number of two-dimensional (2D) materials, including graphene and silicene, have already been realized, others have only been predicted. An interesting example is the two-dimensional form of silicon carbide (2D-SiC). Here, we present an observation of atomically thin and hexagonally bonded nanosized grains of SiC assembling temporarily in graphene oxide pores during an atomic resolution scanning transmission electron microscopy experiment. Even though these small grains do not fully represent the bulk crystal, simulations indicate that their electronic structure already approaches that of 2D-SiC. This is predicted to be flat, but some doubts have remained regarding the preference of Si for sp (3) hybridization. Exploring a number of corrugated morphologies, we find completely flat 2D-SiC to have the lowest energy. We further compute its phonon dispersion, with a Raman-active transverse optical mode, and estimate the core level binding energies. Finally, we study the chemical reactivity of 2D-SiC, suggesting it is like silicene unstable against molecular absorption or interlayer linking. Nonetheless, it can form stable van der Waals-bonded bilayers with either graphene or hexagonal boron nitride, promising to further enrich the family of two-dimensional materials once bulk synthesis is achieved. Nature Publishing Group UK 2017-06-30 /pmc/articles/PMC5493665/ /pubmed/28667311 http://dx.doi.org/10.1038/s41598-017-04683-9 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Susi, Toma Skákalová, Viera Mittelberger, Andreas Kotrusz, Peter Hulman, Martin Pennycook, Timothy J. Mangler, Clemens Kotakoski, Jani Meyer, Jannik C. Computational insights and the observation of SiC nanograin assembly: towards 2D silicon carbide |
title | Computational insights and the observation of SiC nanograin assembly: towards 2D silicon carbide |
title_full | Computational insights and the observation of SiC nanograin assembly: towards 2D silicon carbide |
title_fullStr | Computational insights and the observation of SiC nanograin assembly: towards 2D silicon carbide |
title_full_unstemmed | Computational insights and the observation of SiC nanograin assembly: towards 2D silicon carbide |
title_short | Computational insights and the observation of SiC nanograin assembly: towards 2D silicon carbide |
title_sort | computational insights and the observation of sic nanograin assembly: towards 2d silicon carbide |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5493665/ https://www.ncbi.nlm.nih.gov/pubmed/28667311 http://dx.doi.org/10.1038/s41598-017-04683-9 |
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