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

• Published in: Nanoscale advances Vol. 2; no. 7; pp. 28 - 287
• Main Authors: Liu, Qiong, Zhan, Haifei, Nie, Yihan, Xu, Yanan, Zhu, Huaiyong, Sun, Ziqi, Bell, John, Bo, Arinxin, Gu, Yuantong
• Format: Journal Article
• Language: English
• Published: 14.07.2020
• ISSN: 2516-0230
• DOI: 10.1039/d0na00284d

Transition-metal-doping can improve some physical properties of titanium dioxide (TiO 2 ) nanowires (NWs), which leads to important applications in miniature devices. Here, we investigated the elastic moduli of single-crystalline pristine and Fe-doped rutile TiO 2 NWs using the three-point bending method, which is taken as a case study of impacts on the elastic properties of TiO 2 NWs caused by transition-metal-doping. The Young's modulus of the pristine rutile TiO 2 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 TiO 2 NWs. The vacancies generated by Fe-doping are supposed to cause the reduction of elastic modulus of rutile TiO 2 NWs. This work provides a fundamental understanding of the effects of transition-metal-doping on the elastic properties of TiO 2 NWs. Three-point bending tests of a pristine rutile TiO 2 NW.