Electron microscopy observations of the Au nanorods and Au nanorod/SiO2 nanocapsules

Kouichi Nakashima; Tomoya Inose; Takahiro Oikawa; Masayuki Tokunaga; Keiichiro Hatoyama; Masato Kakihana; Kohsuke Gonda; Yoshio Kobayashi

doi:10.2497/jjspm.66.210

Electron microscopy observations of the Au nanorods and Au nanorod/SiO₂ nanocapsules

Kouichi Nakashima, Tomoya Inose, Takahiro Oikawa, Masayuki Tokunaga, Keiichiro Hatoyama, Masato Kakihana, Kohsuke Gonda, Yoshio Kobayashi

Center for Exploration of New Inorganic Materials

Research output: Contribution to journal › Article › peer-review

Abstract

An in-depth analysis of the morphology of Au nanorod/SiO₂ nanocapsules was performed by scanning transmission electron microscopy (STEM) imaging, secondary electron (SE) imaging, bright-field (BF) imaging, and high-angle annular dark-field (HAADF) imaging. These detailed analyses and high X-ray computerized tomography (CT) values provided key information for the administration of Au nanorod/SiO₂ nanocapsules into the blood of mice. Au, which is a heavy element, exhibits a high X-ray CT value. STEM images were recorded to clearly analyze the morphology of the Au nanorods and Au nanorod/SiO₂ nanocapsules. The results obtained from SE images, BF images, and HAADF images revealed that Au nanorods are covered by SiO₂ and that Au nanorod/ SiO₂ nanocapsules are highly dispersed. Furthermore, 3D tomography reconstruction was performed by using STEM observation. Three-dimensional tomography reconstruction revealed a spatial structure and provided highly reliable information on the Au nanorod/SiO₂ nanocapsules developed in this study.

Original language	English
Pages (from-to)	210-214
Number of pages	5
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	66
Issue number	5
DOIs	https://doi.org/10.2497/jjspm.66.210
Publication status	Published - 2019

Keywords

3D tomography
Au nanorod
Nanocapsule

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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Electron microscopy observations of the Au nanorods and Au nanorod/SiO₂ nanocapsules. / Nakashima, Kouichi; Inose, Tomoya; Oikawa, Takahiro; Tokunaga, Masayuki; Hatoyama, Keiichiro; Kakihana, Masato; Gonda, Kohsuke; Kobayashi, Yoshio.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 66, No. 5, 2019, p. 210-214.

Research output: Contribution to journal › Article › peer-review

Nakashima, Kouichi ; Inose, Tomoya ; Oikawa, Takahiro ; Tokunaga, Masayuki ; Hatoyama, Keiichiro ; Kakihana, Masato ; Gonda, Kohsuke ; Kobayashi, Yoshio. / Electron microscopy observations of the Au nanorods and Au nanorod/SiO₂ nanocapsules. In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy. 2019 ; Vol. 66, No. 5. pp. 210-214.

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AU - Gonda, Kohsuke

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