SrTiO3 Nanocuboids from a Lamellar Microemulsion
نویسندگان
چکیده
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 Xray 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.
منابع مشابه
NORTHWESTERN UNIVERSITY Atomic Surface Structures of Oxide Materials: From Single Crystals to Nanoparticles DISSERTATION SUBMITTED TO THE GRADUATE SCHOOL IN PARTIAL FULFILLMENT OF THE REQUIREMENT For the degree DOCTOR OF PHILOSOPHY
Atomic Surface Structures of Oxide Materials: From Single Crystals to Nanoparticles Yuyuan Lin Atomic surface structures of oxide materials are very important in many areas. Despite the importance, these structures are not fully understood, especially for the nanoparticles. In this study, the atomic surface structures of SrTiO3 single crystals, SrTiO3 nanocuboids, and CeO2 nanoparticles are inv...
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