AI Article Synopsis
- Understanding how nanocrystals develop is essential for controlling their shape and creating new materials.
- Direct observation of atomic pathways in nanocrystal facet development has been challenging.
- This study uses advanced transmission electron microscopy to reveal that the growth of platinum nanocubes stops at the {100} facets due to low ligand mobility, impacting nanocrystal shape control.
Article Abstract
An understanding of how facets of a nanocrystal develop is critical for controlling nanocrystal shape and designing novel functional materials. However, the atomic pathways of nanocrystal facet development are mostly unknown because of the lack of direct observation. We report the imaging of platinum nanocube growth in a liquid cell using transmission electron microscopy with high spatial and temporal resolution. The growth rates of all low index facets are similar until the {100} facets stop growth. The continuous growth of the rest facets leads to a nanocube. Our calculation shows that the much lower ligand mobility on the {100} facets is responsible for the arresting of {100} growing facets. These findings shed light on nanocrystal shape-control mechanisms and future design of nanomaterials.
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| http://dx.doi.org/10.1126/science.1253149 | DOI Listing |
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