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

S. Sueda, K. Yoshida, N. Tanaka

研究成果: Article査読

24 被引用数 (Scopus)

抄録

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]).

本文言語English
ページ(範囲)1120-1127
ページ数8
ジャーナルUltramicroscopy
110
9
DOI
出版ステータスPublished - 2010 8
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • 器械工学

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