SrTiO3 nanocuboids from a lamellar microemulsion

Linhua Hu*, Chuandao Wang, Sungsik Lee, Randall E. Winans, Laurence Marks, Kenneth Poeppelmeier

*Corresponding author for this work

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

Microemulsion science has provided a wide range of possibilities in materials fabrication. Here, we describe a novel approach to the synthesis of SrTiO3 nanoparticles of different shapes from a microemulsion. We show that the microemulsion structure plays a critical role in the shape of the nanoparticles, with diffusion-limited growth when normal or reverse micelles are present to nanocuboids with a kinetic-Wulff shape in a lamellar microemulsion leading to nanocuboids. As determined by a combination of in situ small-angle X-ray scattering (SAXS) and wide-angle X-ray scattering (WAXS) as a function of temperature and ex situ high-angle annular dark field (HAADF) imaging, the as-prepared SrTiO3 nanocuboids grow between three layers of water (3 × 1.1 nm) and two layers of oil (2 × 2.3 nm) leading to individual crystals which are uniformly 8 nm thick with somewhat greater lengths and widths.

Original languageEnglish (US)
Pages (from-to)378-384
Number of pages7
JournalChemistry of Materials
Volume25
Issue number3
DOIs
StatePublished - Feb 12 2013

Keywords

  • SrTiO nanocuboids
  • X-ray scattering
  • lamellar microemulsion
  • perovskite
  • synthesis

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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