Gradient bandgap narrowing in severely deformed ZnO nanoparticles

Yuanshen Qi; Yaron Kauffmann; Anna Kosinova; Askar R. Kilmametov; Boris B. Straumal; Eugen Rabkin

doi:10.1080/21663831.2020.1821111

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Gradient bandgap narrowing in severely deformed ZnO nanoparticles

Original Reports | 更新时间：2026-08-19

- Gradient bandgap narrowing in severely deformed ZnO nanoparticles
- Gradient bandgap narrowing in severely deformed ZnO nanoparticles
- 材料研究快报（英文） 2021年9卷第1期页码：58-64
- 作者机构：
  
  1. a Department of Materials Science and Engineering Technion – Israel Institute of Technology
  2. b Department of Nanostructured Materials Institute of Nanotechnology Karlsruhe Institute of Technology
  3. b Department of Nanostructured Materials Institute of Nanotechnology Karlsruhe Institute of Technology Eggenstein-Leopoldshafen Germany
  4. c Institute of Solid State Physics and Chernogolovka Scientific Center Russian Academy of Sciences Chernogolovka Russia
  5. d Department of Physical Chemistry National University of Science and Technology “MISIS”
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2020.1821111
  中图分类号：
- 网络首发：2020-10-06，
  
  纸质出版：2021
- 稿件说明：
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Yuanshen Qi, Yaron Kauffmann, Anna Kosinova, 等. Gradient bandgap narrowing in severely deformed ZnO nanoparticles[J]. 材料研究快报（英文）, 2021,9(1):58-64.

Yuanshen Qi, Yaron Kauffmann, Anna Kosinova, et al. Gradient bandgap narrowing in severely deformed ZnO nanoparticles[J]. Materials Research Letters, 2021, 9(1): 58-64.
Yuanshen Qi, Yaron Kauffmann, Anna Kosinova, 等. Gradient bandgap narrowing in severely deformed ZnO nanoparticles[J]. 材料研究快报（英文）, 2021,9(1):58-64. DOI： 10.1080/21663831.2020.1821111.

Yuanshen Qi, Yaron Kauffmann, Anna Kosinova, et al. Gradient bandgap narrowing in severely deformed ZnO nanoparticles[J]. Materials Research Letters, 2021, 9(1): 58-64. DOI： 10.1080/21663831.2020.1821111.

摘要

Abstract

Gradient nanostructured metallic materials with a gradual change of grain boundary and dislocation density display unprecedent mechanical properties. Herein

we uncover a gradient of point defects concentration and concomitant gradient bandgap (

) narrowing in metal oxide nanoparticles processed by a combination of severe shearing and frictional sliding deformation. Using the valence electron-energy loss spectroscopy technique

we find a gradual decrease of

from 2.93 eV in the interior to 2.43 eV at the edge of the high-pressure torsion processed ZnO flake-shaped particle. This work paves the way to strain engineering of gradient-structured metal oxide semiconductors for unique functional properties.

IMPACT STATEMENT

We uncover a gradient of oxygen vacancy concentration and concomitant bandgap narrowing in an individual metal oxide nanoparticle processed by a combination of severe shearing and frictional sliding deformation.

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references

Zhan W. Band gap mapping of alloyed ZnO using probe-corrected and monochromated STEM-EELS [dissertation]. University of Oslo; 2018. (Open in a new window)Google Scholar

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