Atypical defect motions in brittle layered sodium titanate nanowires

Bo, Arixin and Chen, Kai and Pickering, Edmund and Zhan, Haifei and Bell, John and Du, Aijun and Zhang, Yongqiang and Wang, Xiaoguang and Zhu, Huaiyong and Shan, Zhiwei and Gu, Yuantong (2018) Atypical defect motions in brittle layered sodium titanate nanowires. Journal of Physical Chemistry Letters, 9 (20). pp. 6052-6059.


Abstract

In situ tensile tests show atypical defect motions in the brittle Na2Ti3O7 (NTO) nanowire (NW) within the elastic deformation range. After brittle fracture, elastic recovery of the NTO NW is followed by reversible motion of the defects in a time-dependent manner. An in situ cyclic loading–unloading test shows that these mobile defects shift back and forth along the NW in accordance with the loading–unloading cycles and eventually restore their initial positions after the load is completely removed. The existence of the defects within the NTO NWs and their motions does not lead to plastic deformation of the NW. The atypical defect motion is speculated to be the result of the glidibility of the TiO6 layers, where weakly bonded cation layers are in between. Exploration of the above novel observation can establish new understandings of the deformation behavior of superlattice nanostructures.


Statistics for USQ ePrint 39353
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Research and Innovation Division (12 Jul 2012 -)
Faculty/School / Institute/Centre: Current - Research and Innovation Division (12 Jul 2012 -)
Date Deposited: 04 Sep 2020 03:07
Last Modified: 11 Sep 2020 02:50
Uncontrolled Keywords: Large-strain plasticity; youngs modulus; dislocation; deformation; transition; nanofibers; dynamics; strength; ions
Fields of Research (2008): 03 Chemical Sciences > 0399 Other Chemical Sciences > 039999 Chemical Sciences not elsewhere classified
Fields of Research (2020): 34 CHEMICAL SCIENCES > 3499 Other chemical sciences > 349999 Other chemical sciences not elsewhere classified
Identification Number or DOI: https://doi.org/10.1021/acs.jpclett.8b02349
URI: http://eprints.usq.edu.au/id/eprint/39353

Actions (login required)

View Item Archive Repository Staff Only