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Effect of Fe-doping on bending elastic properties of single-crystalline rutile TiO2 nanowires

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Abstract

Transition-metal-doping can improve some physical properties of titanium dioxide (TiO2) nanowires (NWs), which leads to important applications in miniature devices. Here, we investigated the elastic moduli of single-crystalline pristine and Fe-doped rutile TiO2 NWs using the three-point bending method, which is taken as a case study of impacts on the elastic properties of TiO2 NWs caused by transition-metal-doping. The Young's modulus of the pristine rutile TiO2 NWs decreases when the cross-sectional area increases (changing from 246 GPa to 93.2 GPa). However, the elastic modulus of the Fe-doped rutile NWs was found to increase with the cross-sectional area (changing from 91.8 GPa to 200 GPa). For NWs with similar geometrical size, the elastic modulus (156.8 GPa) for Fe-doped rutile NWs is 24% smaller than that (194.5 GPa) of the pristine rutile TiO2 NWs. The vacancies generated by Fe-doping are supposed to cause the reduction of elastic modulus of rutile TiO2 NWs. This work provides a fundamental understanding of the effects of transition-metal-doping on the elastic properties of TiO2 NWs.

Graphical abstract: Effect of Fe-doping on bending elastic properties of single-crystalline rutile TiO2 nanowires

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Article information


Submitted
10 Apr 2020
Accepted
16 May 2020
First published
18 May 2020

This article is Open Access

Nanoscale Adv., 2020, Advance Article
Article type
Paper

Effect of Fe-doping on bending elastic properties of single-crystalline rutile TiO2 nanowires

Q. Liu, H. Zhan, Y. Nie, Y. Xu, H. Zhu, Z. Sun, J. Bell, A. Bo and Y. Gu, Nanoscale Adv., 2020, Advance Article , DOI: 10.1039/D0NA00284D

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