Quantification of metallic nanoparticle morphology on TiO2 using HAADF-STEM tomography

S. Sueda, K. Yoshida, N. Tanaka

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Electron tomography is applied to photocatalytic gold/titanium oxide and gold/silver/titanium oxide samples. In order to obtain a tilt series for the electron tomography measurement, high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) is used under cryogenic conditions. Dedicated programs have been developed for measuring volume, surface area, thickness distribution and nearest-neighbour distance of metallic nanoparticles on samples. Using these quantification programs, the 3D morphology of gold and silver nanoparticles is accurately characterized. We paid particular attention to the quantitative measurement of surface area. The measurement error of the method and appropriate magnification are defined using spherical nanoparticle models. We measured the 3D morphology of gold nanoparticles supported on titanium oxide (total volume=6.5×105[nm3], surface area=1.4×105[nm2], and average nearest-neighbour distance=40[nm]).

Original languageEnglish
Pages (from-to)1120-1127
Number of pages8
JournalUltramicroscopy
Volume110
Issue number9
DOIs
Publication statusPublished - 2010 Aug 1
Externally publishedYes

Keywords

  • Electron tomography
  • Gold
  • Metallic nanoparticles
  • STEM
  • Scanning transmission electron microscopy
  • Titanium oxide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Instrumentation

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