Three-dimensional oriented attachment growth of single-crystal pre-perovskite PbTiO3 hollowed fibers

Ruoyu Zhao, Ming Li, Zhaohui Ren, Yihan Zhu, Gaorong Han

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

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 languageEnglish (US)
Pages (from-to)448-453
Number of pages6
JournalCrystEngComm
Volume20
Issue number4
DOIs
StatePublished - 2018

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