Abstract
Hollowed single-crystal pre-perovskite PbTiO fibers (PP-PTF) were successfully synthesized via a polyvinyl alcohol (PVA) assisted hydrothermal process. The as-prepared PP-PTF were characterized to be 0.3-1 μm in diameter and tens of micrometers in length by adjusting the concentration of PVA to 0.8 g L. Microstructure characterization of the samples at different reaction times revealed that PP-PTF were formed via a three-dimensional (3D) hierarchical oriented attachment (OA) growth process. The initial growth units were determined to be single-crystal pre-perovskite PbTiO fibers with a diameter of 10-20 nm. Zeta potential measurement suggested that the main driving force of the OA process is the surface electrostatic force, which is induced by the incompletely bonded Pb and O atomic layers on the surface of the {110} plane. Moreover, molecular dynamics simulations have been employed to reveal a stable configuration of the initial pre-perovskite PbTiO growth units, agreeing well with the experimental results.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 448-453 |
| Number of pages | 6 |
| Journal | CrystEngComm |
| Volume | 20 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2018 |
Bibliographical note
KAUST Repository Item: Exported on 2020-10-01Acknowledgements: This work was financially supported by the National Natural Science Foundation of China (No. 51232006 and 51472218) and the Fundamental Research Funds for the Central Universities (No. 2017FZA4008).