期刊
NANO LETTERS
卷 14, 期 11, 页码 6639-6643出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl5032919
关键词
Crystal bonding; in situ TEM; nanoparticles; nanocrystals; crystal defect
类别
资金
- Singapore National Research Foundation's Competitive research program [NRF-CRP9-2011-04]
- Electron Microscopy Facility at Center for Bioimaging Science, National University of Singapore
- Lee Kuan Yew endowment fund
Nanocrystal bonding is an important phenomenon in crystal growth and nanoscale welding. Here, we show that for gold nanocrystals bonding in solution can follow two distinct pathways: (1) coherent, defect-free bonding occurs when two nanocrystals attach with their lattices aligned to within a critical angle; and (2) beyond this critical angle, defects form at the interfaces where the nanocrystals merge. The critical misalignment angle for similar to 10 nm crystals is similar to 15 degrees in both in situ experiments and full-atom molecular dynamics simulations. Understanding the origin of this critical angle during bonding may help us predict and manage strain profiles in nanoscale assemblies and inspire techniques toward reproducible and extensible architectures using only basic crystalline blocks.
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