Wall-thickness-dependent strength of nanotubular ZnO

Abstract We fabricate nanotubular ZnO with wall thickness of 45, 92, 123 nm using nanoporous gold (np-Au) with ligament diameter at necks of 1.43 μm as sacrificial template. Through micro-tensile and micro-compressive testing of nanotubular ZnO structures, we find that the exponent m in $$\bar{\sigm...

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Autores principales:	Na-Ri Kang, Young-Cheon Kim, Hansol Jeon, Seong Keun Kim, Jae-il Jang, Heung Nam Han, Ju-Young Kim
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/42e3e0a8ea564c5aaa0a9e849cf5a8c6
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spelling	oai:doaj.org-article:42e3e0a8ea564c5aaa0a9e849cf5a8c62021-12-02T16:06:16ZWall-thickness-dependent strength of nanotubular ZnO10.1038/s41598-017-04696-42045-2322https://doaj.org/article/42e3e0a8ea564c5aaa0a9e849cf5a8c62017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04696-4https://doaj.org/toc/2045-2322Abstract We fabricate nanotubular ZnO with wall thickness of 45, 92, 123 nm using nanoporous gold (np-Au) with ligament diameter at necks of 1.43 μm as sacrificial template. Through micro-tensile and micro-compressive testing of nanotubular ZnO structures, we find that the exponent m in $$\bar{\sigma }\propto {\bar{\rho }}^{m}$$ σ ¯ ∝ ρ ¯ m , where $$\bar{\sigma }$$ σ ¯ is the relative strength and $$\bar{\rho }$$ ρ ¯ is the relative density, for tension is 1.09 and for compression is 0.63. Both exponents are lower than the value of 1.5 in the Gibson-Ashby model that describes the relation between relative strength and relative density where the strength of constituent material is independent of external size, which indicates that strength of constituent ZnO increases as wall thickness decreases. We find, based on hole-nanoindentation and glazing incidence X-ray diffraction, that this wall-thickness-dependent strength of nanotubular ZnO is not caused by strengthening of constituent ZnO by size reduction at the nanoscale. Finite element analysis suggests that the wall-thickness-dependent strength of nanotubular ZnO originates from nanotubular structures formed on ligaments of np-Au.Na-Ri KangYoung-Cheon KimHansol JeonSeong Keun KimJae-il JangHeung Nam HanJu-Young KimNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Na-Ri Kang Young-Cheon Kim Hansol Jeon Seong Keun Kim Jae-il Jang Heung Nam Han Ju-Young Kim Wall-thickness-dependent strength of nanotubular ZnO
description	Abstract We fabricate nanotubular ZnO with wall thickness of 45, 92, 123 nm using nanoporous gold (np-Au) with ligament diameter at necks of 1.43 μm as sacrificial template. Through micro-tensile and micro-compressive testing of nanotubular ZnO structures, we find that the exponent m in $$\bar{\sigma }\propto {\bar{\rho }}^{m}$$ σ ¯ ∝ ρ ¯ m , where $$\bar{\sigma }$$ σ ¯ is the relative strength and $$\bar{\rho }$$ ρ ¯ is the relative density, for tension is 1.09 and for compression is 0.63. Both exponents are lower than the value of 1.5 in the Gibson-Ashby model that describes the relation between relative strength and relative density where the strength of constituent material is independent of external size, which indicates that strength of constituent ZnO increases as wall thickness decreases. We find, based on hole-nanoindentation and glazing incidence X-ray diffraction, that this wall-thickness-dependent strength of nanotubular ZnO is not caused by strengthening of constituent ZnO by size reduction at the nanoscale. Finite element analysis suggests that the wall-thickness-dependent strength of nanotubular ZnO originates from nanotubular structures formed on ligaments of np-Au.
format	article
author	Na-Ri Kang Young-Cheon Kim Hansol Jeon Seong Keun Kim Jae-il Jang Heung Nam Han Ju-Young Kim
author_facet	Na-Ri Kang Young-Cheon Kim Hansol Jeon Seong Keun Kim Jae-il Jang Heung Nam Han Ju-Young Kim
author_sort	Na-Ri Kang
title	Wall-thickness-dependent strength of nanotubular ZnO
title_short	Wall-thickness-dependent strength of nanotubular ZnO
title_full	Wall-thickness-dependent strength of nanotubular ZnO
title_fullStr	Wall-thickness-dependent strength of nanotubular ZnO
title_full_unstemmed	Wall-thickness-dependent strength of nanotubular ZnO
title_sort	wall-thickness-dependent strength of nanotubular zno
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/42e3e0a8ea564c5aaa0a9e849cf5a8c6
work_keys_str_mv	AT narikang wallthicknessdependentstrengthofnanotubularzno AT youngcheonkim wallthicknessdependentstrengthofnanotubularzno AT hansoljeon wallthicknessdependentstrengthofnanotubularzno AT seongkeunkim wallthicknessdependentstrengthofnanotubularzno AT jaeiljang wallthicknessdependentstrengthofnanotubularzno AT heungnamhan wallthicknessdependentstrengthofnanotubularzno AT juyoungkim wallthicknessdependentstrengthofnanotubularzno
_version_	1718385018624016384

Wall-thickness-dependent strength of nanotubular ZnO

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