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Issue 4, 2018
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Three-dimensional oriented attachment growth of single-crystal pre-perovskite PbTiO3 hollowed fibers

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Abstract

Hollowed single-crystal pre-perovskite PbTiO3 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−1. 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 PbTiO3 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 PbTiO3 growth units, agreeing well with the experimental results.

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

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Article information


Submitted
10 Oct 2017
Accepted
10 Dec 2017
First published
11 Dec 2017

CrystEngComm, 2018,20, 448-453
Article type
Paper

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

R. Zhao, M. Li, Z. Ren, Y. Zhu and G. Han, CrystEngComm, 2018, 20, 448
DOI: 10.1039/C7CE01780D

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