Tilted face-centered-cubic supercrystals of PbS nanocubes.
basic_science · Level V
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- Record sourced from PubMed, PMID 22813064.
- Also identified by DOI 10.1021/nl302324b.
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Abstract
We demonstrate a direct fabrication of PbS nanocube supercrystals without size-selection pretreatment on the building blocks. Electron microscopic and synchrotron small angle X-ray scattering analyses confirm that nanocubes pack through a tilted face-centered-cubic (fcc) arrangement, that is, face-to-face along the <110>(super) direction, resulting in a real packing efficiency of as high as ∼83%. This new type of superstructure consisting of nanocubes as building blocks, reported here for the first time, is considered the most stable surfactant-capped nanocube superstructure determined by far.