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

被引：43

作者：

Wei, Jinjian ^{[1
]}

Niikura, Kenichi ^{[2
]}

Higuchi, Takeshi ^{[3
]}

Kimura, Takashi ^{[2
]}

Mitomo, Hideyuki ^{[2
]}

Jinnai, Hiroshi ^{[3
]}

Joti, Yasumasa ^{[4
]}

Bessho, Yoshitaka ^{[5
,6
]}

Nishino, Yoshinori ^{[2
]}

Matsuo, Yasutaka ^{[2
]}

Ijiro, Kuniharu ^{[2
]}

机构：

[1] Hokkaido Univ, Grad Sch Chem Sci & Engn, Sapporo, Hokkaido 0608628, Japan

[2] Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 0010021, Japan

[3] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

[4] Japan Synchrotron Radiat Res Inst, SPring 8, 1-1-1 Kouto, Sayo Cho, Hyogo 6795198, Japan

[5] RIKEN, SPring Ctr 8, 1-1-1 Kouto, Sayo Cho, Hyogo 6795148, Japan

[6] Acad Sinica, Inst Phys, 128 Sec 2,Acad Rd, Taipei 11529, Taiwan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2016年 / 138卷 / 10期

基金：

日本科学技术振兴机构;

关键词：

VESICLES; DESIGN; SUPERLATTICES; NANOCRYSTALS; PACKING; DRIVEN;

D O I：

10.1021/jacs.5b12456

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：3274 / 3277

页数：4

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