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Polar surface structure of oxide nanocrystals revealed with solid-state NMR spectroscopy

Compared to nanomaterials exposing nonpolar facets, polar-faceted nanocrystals often exhibit unexpected and interesting properties. The electrostatic instability arising from the intrinsic dipole moments of polar facets, however, leads to different surface configurations in many cases, making it cha...

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Autores principales: Chen, Junchao, Wu, Xin-Ping, Hope, Michael A., Qian, Kun, Halat, David M., Liu, Tao, Li, Yuhong, Shen, Li, Ke, Xiaokang, Wen, Yujie, Du, Jia-Huan, Magusin, Pieter C. M. M., Paul, Subhradip, Ding, Weiping, Gong, Xue-Qing, Grey, Clare P., Peng, Luming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6882792/
https://www.ncbi.nlm.nih.gov/pubmed/31780658
http://dx.doi.org/10.1038/s41467-019-13424-7
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author Chen, Junchao
Wu, Xin-Ping
Hope, Michael A.
Qian, Kun
Halat, David M.
Liu, Tao
Li, Yuhong
Shen, Li
Ke, Xiaokang
Wen, Yujie
Du, Jia-Huan
Magusin, Pieter C. M. M.
Paul, Subhradip
Ding, Weiping
Gong, Xue-Qing
Grey, Clare P.
Peng, Luming
author_facet Chen, Junchao
Wu, Xin-Ping
Hope, Michael A.
Qian, Kun
Halat, David M.
Liu, Tao
Li, Yuhong
Shen, Li
Ke, Xiaokang
Wen, Yujie
Du, Jia-Huan
Magusin, Pieter C. M. M.
Paul, Subhradip
Ding, Weiping
Gong, Xue-Qing
Grey, Clare P.
Peng, Luming
author_sort Chen, Junchao
collection PubMed
description Compared to nanomaterials exposing nonpolar facets, polar-faceted nanocrystals often exhibit unexpected and interesting properties. The electrostatic instability arising from the intrinsic dipole moments of polar facets, however, leads to different surface configurations in many cases, making it challenging to extract detailed structural information and develop structure-property relations. The widely used electron microscopy techniques are limited because the volumes sampled may not be representative, and they provide little chemical bonding information with low contrast of light elements. With ceria nanocubes exposing (100) facets as an example, here we show that the polar surface structure of oxide nanocrystals can be investigated by applying (17)O and (1)H solid-state NMR spectroscopy and dynamic nuclear polarization, combined with DFT calculations. Both CeO(4)-termination reconstructions and hydroxyls are present for surface polarity compensation and their concentrations can be quantified. These results open up new possibilities for investigating the structure and properties of oxide nanostructures with polar facets.
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spelling pubmed-68827922019-12-03 Polar surface structure of oxide nanocrystals revealed with solid-state NMR spectroscopy Chen, Junchao Wu, Xin-Ping Hope, Michael A. Qian, Kun Halat, David M. Liu, Tao Li, Yuhong Shen, Li Ke, Xiaokang Wen, Yujie Du, Jia-Huan Magusin, Pieter C. M. M. Paul, Subhradip Ding, Weiping Gong, Xue-Qing Grey, Clare P. Peng, Luming Nat Commun Article Compared to nanomaterials exposing nonpolar facets, polar-faceted nanocrystals often exhibit unexpected and interesting properties. The electrostatic instability arising from the intrinsic dipole moments of polar facets, however, leads to different surface configurations in many cases, making it challenging to extract detailed structural information and develop structure-property relations. The widely used electron microscopy techniques are limited because the volumes sampled may not be representative, and they provide little chemical bonding information with low contrast of light elements. With ceria nanocubes exposing (100) facets as an example, here we show that the polar surface structure of oxide nanocrystals can be investigated by applying (17)O and (1)H solid-state NMR spectroscopy and dynamic nuclear polarization, combined with DFT calculations. Both CeO(4)-termination reconstructions and hydroxyls are present for surface polarity compensation and their concentrations can be quantified. These results open up new possibilities for investigating the structure and properties of oxide nanostructures with polar facets. Nature Publishing Group UK 2019-11-28 /pmc/articles/PMC6882792/ /pubmed/31780658 http://dx.doi.org/10.1038/s41467-019-13424-7 Text en © The Author(s) 2019 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
Chen, Junchao
Wu, Xin-Ping
Hope, Michael A.
Qian, Kun
Halat, David M.
Liu, Tao
Li, Yuhong
Shen, Li
Ke, Xiaokang
Wen, Yujie
Du, Jia-Huan
Magusin, Pieter C. M. M.
Paul, Subhradip
Ding, Weiping
Gong, Xue-Qing
Grey, Clare P.
Peng, Luming
Polar surface structure of oxide nanocrystals revealed with solid-state NMR spectroscopy
title Polar surface structure of oxide nanocrystals revealed with solid-state NMR spectroscopy
title_full Polar surface structure of oxide nanocrystals revealed with solid-state NMR spectroscopy
title_fullStr Polar surface structure of oxide nanocrystals revealed with solid-state NMR spectroscopy
title_full_unstemmed Polar surface structure of oxide nanocrystals revealed with solid-state NMR spectroscopy
title_short Polar surface structure of oxide nanocrystals revealed with solid-state NMR spectroscopy
title_sort polar surface structure of oxide nanocrystals revealed with solid-state nmr spectroscopy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6882792/
https://www.ncbi.nlm.nih.gov/pubmed/31780658
http://dx.doi.org/10.1038/s41467-019-13424-7
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