Yolk/Shell Assembly of Gold Nanoparticles by Size Segregation in Solution

Jinjian Wei; Kenichi Niikura; Takeshi Higuchi; Takashi Kimura; Hideyuki Mitomo; Hiroshi Jinnai; Yasumasa Joti; Yoshitaka Bessho; Yoshinori Nishino; Yasutaka Matsuo; Kuniharu Ijiro

doi:10.1021/jacs.5b12456

Yolk/Shell Assembly of Gold Nanoparticles by Size Segregation in Solution

Jinjian Wei, Kenichi Niikura, Takeshi Higuchi, Takashi Kimura, Hideyuki Mitomo, Hiroshi Jinnai, Yasumasa Joti, Yoshitaka Bessho, Yoshinori Nishino, Yasutaka Matsuo, Kuniharu Ijiro

Division of Measurements

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

27 Citations (Scopus)

Abstract

We demonstrate that binary mixtures of small and large gold nanoparticles (GNPs) (5/15, 5/30, 10/30, and 15/30 nm in diameter) in the presence of a glucose-terminated fluorinated oligo(ethylene glycol) ligand can spontaneously form size-segregated assemblies. The outermost layer of the assembly is composed of a single layer of small-sized GNPs, while the larger-sized GNPs are located in the interior, forming what is referred to as a yolk/shell assembly. Time course study reveals that small and large GNPs aggregate together, and these kinetically trapped aggregations were transformed into a size-segregated structure by repeating fusions. A yolk/shell structure was directly visualized in solution by X-ray laser diffraction imaging, indicating that the structure was truly formed in solution, but not through a drying process.

Original language	English
Pages (from-to)	3274-3277
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	138
Issue number	10
DOIs	https://doi.org/10.1021/jacs.5b12456
Publication status	Published - 2016 Mar 16

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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Yolk/Shell Assembly of Gold Nanoparticles by Size Segregation in Solution. / Wei, Jinjian; Niikura, Kenichi; Higuchi, Takeshi; Kimura, Takashi; Mitomo, Hideyuki; Jinnai, Hiroshi; Joti, Yasumasa; Bessho, Yoshitaka; Nishino, Yoshinori; Matsuo, Yasutaka; Ijiro, Kuniharu.

In: Journal of the American Chemical Society, Vol. 138, No. 10, 16.03.2016, p. 3274-3277.

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

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abstract = "We demonstrate that binary mixtures of small and large gold nanoparticles (GNPs) (5/15, 5/30, 10/30, and 15/30 nm in diameter) in the presence of a glucose-terminated fluorinated oligo(ethylene glycol) ligand can spontaneously form size-segregated assemblies. The outermost layer of the assembly is composed of a single layer of small-sized GNPs, while the larger-sized GNPs are located in the interior, forming what is referred to as a yolk/shell assembly. Time course study reveals that small and large GNPs aggregate together, and these kinetically trapped aggregations were transformed into a size-segregated structure by repeating fusions. A yolk/shell structure was directly visualized in solution by X-ray laser diffraction imaging, indicating that the structure was truly formed in solution, but not through a drying process.",

author = "Jinjian Wei and Kenichi Niikura and Takeshi Higuchi and Takashi Kimura and Hideyuki Mitomo and Hiroshi Jinnai and Yasumasa Joti and Yoshitaka Bessho and Yoshinori Nishino and Yasutaka Matsuo and Kuniharu Ijiro",

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AU - Wei, Jinjian

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AU - Higuchi, Takeshi

AU - Kimura, Takashi

AU - Mitomo, Hideyuki

AU - Jinnai, Hiroshi

AU - Joti, Yasumasa

AU - Bessho, Yoshitaka

AU - Nishino, Yoshinori

AU - Matsuo, Yasutaka

AU - Ijiro, Kuniharu

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