期刊
SCIENCE
卷 345, 期 6199, 页码 916-919出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1253149
关键词
-
资金
- U.S. Department of Energy (DOE) Office of Basic Energy Sciences [DE-AC02-05CH11231]
- DOE Office of Science
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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