Elastic properties of 2D ultrathin tungsten nitride crystals grown by chemical vapor deposition

3D transition metal nitrides are well recognized for their good electrical conductivity, superior mechanical properties, and high chemical stability. Recently, 2D transition metal nitrides have been successfully prepared in the form of nanosheets and show potential application in energy storage. How...

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Main Authors: Wang, Hong, Sandoz-Rosado, Emil J., Tsang, Siu Hon, Lin, Jinjun, Zhu, Minmin, Mallick, Govind, Liu, Zheng, Teo, Edwin Hang Tong
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/142547
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1425472020-06-24T04:08:03Z Elastic properties of 2D ultrathin tungsten nitride crystals grown by chemical vapor deposition Wang, Hong Sandoz-Rosado, Emil J. Tsang, Siu Hon Lin, Jinjun Zhu, Minmin Mallick, Govind Liu, Zheng Teo, Edwin Hang Tong School of Electrical and Electronic Engineering School of Materials Science and Engineering Temasek Laboratories Engineering::Materials 2D Material Atomic Force Microscopy 3D transition metal nitrides are well recognized for their good electrical conductivity, superior mechanical properties, and high chemical stability. Recently, 2D transition metal nitrides have been successfully prepared in the form of nanosheets and show potential application in energy storage. However, the synthesis of highly crystalline and well-shaped 2D nitrides layers is still in demand for the investigation of their intrinsic physical properties. The present paper reports the growth of ultrathin tungsten nitride crystals on SiO2/Si substrates by a salt-assisted chemical vapor deposition method. High-resolution transmission microscopy confirms the as-grown samples are highly crystalline WN. The stiffness of ultrathin WN is investigated by atomic force microscopy–based nanoindentation with the film suspended on circular holes. The 3D Young's modulus of few-layer (4.5 nm thick or more) WN is determined to be 3.9 × 102 ± 1.6 × 102 GPa, which is comparable with the best experimental reported values in the 2D family except graphene and hexagonal boron nitride. The synthesis approach presented in this paper offers the possibilities of producing and utilizing other highly crystalline 2D transition-metal nitride crystals. Accepted version 2020-06-24T04:05:21Z 2020-06-24T04:05:21Z 2019 Journal Article Wang, H., Sandoz‐Rosado, E. J., Tsang, S. H., Lin, J., Zhu, M., Mallick, G., . . . Teo, E. H. T. (2019). Elastic properties of 2D Ultrathin tungsten nitride crystals grown by chemical vapor deposition. Advanced Functional Materials, 29(31), 1902663-. doi:10.1002/adfm.201902663 1616-301X https://hdl.handle.net/10356/142547 10.1002/adfm.201902663 2-s2.0-85067398242 31 29 en Advanced Functional Materials This is the accepted version of the following article: Wang, H., Sandoz‐Rosado, E. J., Tsang, S. H., Lin, J., Zhu, M., Mallick, G., . . . Teo, E. H. T. (2019). Elastic properties of 2D Ultrathin tungsten nitride crystals grown by chemical vapor deposition. Advanced Functional Materials, 29(31), 1902663-, which has been published in final form at http://dx.doi.org/10.1002/adfm.201902663. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy [https://authorservices.wiley.com/authorresources/Journal-Authors/licensing/self-archiving.html]. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Engineering::Materials
2D Material
Atomic Force Microscopy
spellingShingle Engineering::Materials
2D Material
Atomic Force Microscopy
Wang, Hong
Sandoz-Rosado, Emil J.
Tsang, Siu Hon
Lin, Jinjun
Zhu, Minmin
Mallick, Govind
Liu, Zheng
Teo, Edwin Hang Tong
Elastic properties of 2D ultrathin tungsten nitride crystals grown by chemical vapor deposition
description 3D transition metal nitrides are well recognized for their good electrical conductivity, superior mechanical properties, and high chemical stability. Recently, 2D transition metal nitrides have been successfully prepared in the form of nanosheets and show potential application in energy storage. However, the synthesis of highly crystalline and well-shaped 2D nitrides layers is still in demand for the investigation of their intrinsic physical properties. The present paper reports the growth of ultrathin tungsten nitride crystals on SiO2/Si substrates by a salt-assisted chemical vapor deposition method. High-resolution transmission microscopy confirms the as-grown samples are highly crystalline WN. The stiffness of ultrathin WN is investigated by atomic force microscopy–based nanoindentation with the film suspended on circular holes. The 3D Young's modulus of few-layer (4.5 nm thick or more) WN is determined to be 3.9 × 102 ± 1.6 × 102 GPa, which is comparable with the best experimental reported values in the 2D family except graphene and hexagonal boron nitride. The synthesis approach presented in this paper offers the possibilities of producing and utilizing other highly crystalline 2D transition-metal nitride crystals.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Wang, Hong
Sandoz-Rosado, Emil J.
Tsang, Siu Hon
Lin, Jinjun
Zhu, Minmin
Mallick, Govind
Liu, Zheng
Teo, Edwin Hang Tong
format Article
author Wang, Hong
Sandoz-Rosado, Emil J.
Tsang, Siu Hon
Lin, Jinjun
Zhu, Minmin
Mallick, Govind
Liu, Zheng
Teo, Edwin Hang Tong
author_sort Wang, Hong
title Elastic properties of 2D ultrathin tungsten nitride crystals grown by chemical vapor deposition
title_short Elastic properties of 2D ultrathin tungsten nitride crystals grown by chemical vapor deposition
title_full Elastic properties of 2D ultrathin tungsten nitride crystals grown by chemical vapor deposition
title_fullStr Elastic properties of 2D ultrathin tungsten nitride crystals grown by chemical vapor deposition
title_full_unstemmed Elastic properties of 2D ultrathin tungsten nitride crystals grown by chemical vapor deposition
title_sort elastic properties of 2d ultrathin tungsten nitride crystals grown by chemical vapor deposition
publishDate 2020
url https://hdl.handle.net/10356/142547
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