| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments III
|
| Presentation Title |
In Situ Irradiation of TiO2 Nanotubes |
| Author(s) |
Hui Xiong, Chao Yang, Tristan Olsen, Miu Lun Lau, Kassiopeia Smith, Janelle Wharry, Khalid Hattar, Yongqiang Wang, Wei-Ying Chen, Yaqiao Wu, Badri Narayanan, Min Long, Dewen Hou |
| On-Site Speaker (Planned) |
Hui Xiong |
| Abstract Scope |
Utilizing situ ion irradiation transmission electron microscopy (TEM) we investigate the morphological and structural evolution in TiO2 nanotubes under Au and Kr ion irradiation with complementary molecular dynamics (MD) simulations to calculate the volume of amorphous and anatase TiO2. It is found that anatase TiO2 nanotubes exhibit morphological stability throughout irradiation. Amorphous TiO2 nanotubes undergo irradiation-induced crystallization under Au ion irradiation. While the majority of the initially amorphous tubes become fully crystallized, some tubes remain only partially crystallized. These partially crystalline tubes also bend during irradiation, due to internal stresses associated with the densification that occurs through crystallization, as confirmed by MD calculations. This mechanism presents a novel irradiation-based pathway for tuning the structure and morphology of advanced energy storage materials. These results are discussed in the context of irradiation-induced order/disorder transformations. |