期刊
NANO LETTERS
卷 -, 期 -, 页码 -出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c02491
关键词
In situ TEM; Au nanoparticles; diffusion; reconstruction; coalescence; nanoparticle growth
类别
资金
- National Natural Science Foundation of China
- Tianjin Municipal Science and Technology Commission
- [51701143]
- [18JCYBJC86900]
This study used advanced in situ characterization techniques to observe the formation of atomic material transport channels during the coalescence process of metal nano particles. It revealed an atomic ordered arrangement growth mechanism after the completion of nucleation and explained the formation principle of the material transport channels using density functional theory.
In practical applications, the coalescence of metal nano particles (NPs) is a major factor affecting their physical chemistry properties. Currently, due to a lack of understanding of the atomic-level mechanisms during the nucleation and growth stages of coalescence, the correlation between the different dynamic factors in the different stages of NP coalescence is unclear. In this study, we used advanced in situ characterization techniques to observe the formation of atomic material transport channels (Au chains) during the initiation of coalescence nucleation. We focused on the movement and migration states of Au atoms and discovered an atomic ordered arrangement growth mechanism that occurs after the completion of nucleation. Simultaneously, we used density functional theory to reveal the formation principle of Au chains. These findings improve our understanding of the atomic-scale coalescence process, which can provide a new perspective for further research on coalescence atomic dynamics.
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