A welding phenomenon of dissimilar nanoparticles in dispersion

被引：21

作者：

Huang, Zhiqi ^{[1
,2
]}

Zhao, Zhi-Jian ^{[1
]}

Zhang, Qian ^{[2
]}

Han, Lili ^{[3
]}

Jiang, Xiumei ^{[4
]}

Li, Chao ^{[3
]}

Cardenas, Maria T. Perez ^{[2
]}

Huang, Peng ^{[5
]}

Yin, Jun-Jie ^{[4
]}

Luo, Jun ^{[3
]}

Gong, Jinlong ^{[1
]}

Nie, Zhihong ^{[2
,6
]}

机构：

[1] Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn, Sch Chem Engn & Technol, Key Lab Green Chem Technol,Minist Educ, Tianjin 300072, Peoples R China

[2] Univ Maryland, Dept Chem & Biochem, College Pk, MD 20742 USA

[3] Tianjin Univ Technol, Inst New Energy Mat & Low Carbon Technol, TUT FEI Joint Lab, Ctr Electron Microscopy,Sch Mat Sci & Engn, Tianjin 300384, Peoples R China

[4] US FDA, Div Analyt Chem, Off Regulatory Sci, Ctr Food Safety & Appl Nutr, College Pk, MD 20740 USA

[5] Shenzhen Univ, Sch Med, Dept Biomed Engn, Guangdong Key Lab Biomed Measurements & Ultrasoun, Shenzhen 518060, Peoples R China

[6] Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200438, Peoples R China

来源：

NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期

基金：

国家重点研发计划; 美国国家科学基金会;

关键词：

HYBRID NANOSTRUCTURES; NANOCRYSTALS; AU; GOLD; GROWTH; TRANSFORMATION; OVERGROWTH; DIFFUSION; NANORODS; SURFACE;

D O I：

10.1038/s41467-018-08206-6

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The oriented attachment of small nanoparticles (NPs) is recognized as an important mechanism involved in the growth of inorganic nanocrystals. However, non-oriented attachment of dissimilar NPs has been rarely observed in dispersion. This communication reports a welding phenomenon occurred directly between as-synthesized dispersions of single-component Au and chalcogenide NPs, which leads to the formation of asymmetric Au-chalcogenide hybrid NPs (HNPs). The welding of dissimilar NPs in dispersion is mainly driven by the ligand desorption-induced conformal contact between NPs and the diffusion of Au into chalcogenide NPs. The welding process can occur between NPs with distinct shapes or different capping agents or in different solvent media. A two-step assembly-welding mechanism is proposed for this process, based on our in situ electron spin resonance measurements and ab initio molecular dynamics simulation. The understanding of NP welding in dispersion may lead to the development of unconventional synthetic tools for the fabrication of hybrid nanostructures with diverse applications.

引用

页数：8

共 46 条

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