A nanoindentation approach for unveiling the photoplastic effects by a “light switch”: A case study on ZnO

Oguri, Hiroto; Li, Yan; Nakamura, Atsutomo

Journal of the American Ceramic Society, 2024, e20338

Number of Access:436（2025-08-16 04:13 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/100344

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Title
A nanoindentation approach for unveiling the photoplastic effects by a “light switch”: A case study on ZnO
Creator
CreatorName
Oguri, Hiroto
NRID
1000070930171 1000070930171
ORCID
0000-0002-9274-2516 0000-0002-9274-2516
researchmap permalink
liyan-osaka_univ liyan-osaka_univ
CreatorName
Li, Yan
NRID
1000020419675 1000020419675
ORCID
0000-0002-4324-1512 0000-0002-4324-1512
researchmap permalink
read0210196 read0210196
Scopus Author ID
56421164400 56421164400
CreatorName
Nakamura, Atsutomo
Subject
compound semiconductors
nanoindentation
oxides
plasticity
wurtzite
Description
Oguri H., Li Y., Nakamura A. A nanoindentation approach for unveiling the photoplastic effects by a “light switch”: A case study on ZnO. Journal of the American Ceramic Society , (2024); https://doi.org/10.1111/jace.20338.
Abstract
The nanoindentation method is a widely utilized approach for characterizing the mechanical properties of materials at the nanoscale. In typical nanoindentation tests, the mechanical responses of materials are monitored while maintaining constant environmental factors, such as lighting and temperature, in order to ensure the reliability of the results. Here, we propose a testing method that switches the light conditions during a single nanoindentation creep test to detect slight changes in the mechanical response due to weak light illumination. To achieve this, a reference sample of fused silica was employed, which is insensitive to light, in order to compensate for the thermal expansion/contraction of approximately 1 nm due to the light environment. The calibrated results revealed the instantaneous suppressive influence of light illumination on the indentation creep behavior of ZnO. It was found that upon initiating illumination, the indentation creep rate decreased by 45%, whereas terminating illumination led to a dramatic 19.4-fold increase in the creep rate. The effective testing pattern involving a “light switch” enables quantitatively visualizing the light illumination effects through the instant “jump” in the creep strain rate within a single test, facilitating the detection of minor and instantaneous effects of light environments on indentation creep behavior.
Publisher
John Wiley and Sons Inc
Source Title
Journal of the American Ceramic Society
Page
e20338
Date of Issued
2024-12-26
Language
English
Handle URL
https://hdl.handle.net/11094/100344
PISSN
00027820
eISSN
15512916
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1111/jace.20338
Access Rights
open access
CopyRight
This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article