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Structural analysis of rattle‐type hollow mesoporous silica spheres using electron tomography and energy filtered imaging
Author(s) -
Okuda Mitsuhiro,
Takeguchi Masaki,
Zhu Yufang,
Hashimoto Ayako,
Ogawa Nobuhiro,
Tagaya Motohiro,
Chen Song,
Hanagata Nobutaka,
Ikoma Toshiyuki
Publication year - 2010
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.3572
Subject(s) - electron tomography , transmission electron microscopy , mesoporous silica , scanning transmission electron microscopy , mesoporous material , materials science , scanning electron microscope , spheres , particle (ecology) , shell (structure) , nanoparticle , nanotechnology , analytical chemistry (journal) , chemistry , composite material , chromatography , physics , catalysis , biochemistry , oceanography , astronomy , geology
Rattle‐type hollow mesoporous silica spheres including an internal Fe 2 O 3 ‐containing particle were prepared using a carbon–iron template method. Elemental distribution of the silica spheres was analyzed using an energy‐filter transmission electron microscopy, and the three‐dimensional (3D) structure was visualized by a computer tomography with a scanning transmission electron microscopy (STEM). From the 3D structure reconstructed with a tilted series of high‐angle annular dark field images, the diameter and shell thickness of the hollow mesoporous silica spheres were determined to be 381 ± 14 and 61 ± 10 nm. It was also found that the internal Fe 2 O 3 ‐containing particle with the diameter of 104 ± 7 nm also exhibited a hollow structure with the shell thickness of 24 ± 6 nm. Copyright © 2010 John Wiley & Sons, Ltd.
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