Electron microscopy study of binary nanocolloidal crystals with ico -AB13 structure made of monodisperse Silica Nanoparticles

Yasuhiro Sakamoto, Yoshiyuki Kuroda, Susumu Toko, Takuji Ikeda, Toshiyuki Matsui, Kazuyuki Kuroda

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Binary nanocolloidal crystals (BNCCs) made of two different nanoparticles are a promising new class of advanced functional materials with synergetic and collective properties. These materials have been shown to exhibit excellent structural diversity and a wide range of different stoichiometries. In this study, BNCCs with an ico-AB13 structure were prepared as inorganic bulk materials by simple solvent evaporation of silica nanocolloidal aqueous solutions. Systematic analysis of Fourier diffractograms of high-resolution transmission electron microscopy (HRTEM) images shows the reflection conditions of the space group Fm3c without any ambiguities, which is indicative of the ico-AB13 structure. Simulated HRTEM images based on the ideal ico-AB13 structure were also calculated under the kinematical scattering approximation. These images showed the characteristic fine structure of the ico-AB13 structure along the high-symmetry axes. The agreement between the observed and simulated HRTEM images indicates the validity of the ideal ico-AB13 model structure. This result shows that HRTEM together with a quantitative image simulation is a versatile method for the characterization of the BNCCs at the nanoscale and can be routinely applied for any nanocolloidal crystals, even for complex structures.

Original languageEnglish
Pages (from-to)15004-15010
Number of pages7
JournalJournal of Physical Chemistry C
Volume118
Issue number27
DOIs
Publication statusPublished - 2014 Jul 10

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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