Structural Basis for Near Unity Quantum Yield Core/Shell Nanostructures
- 9 June 2006
- journal article
- letter
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 6 (7) , 1496-1501
- https://doi.org/10.1021/nl060993k
Abstract
Aberration-corrected Z-contrast scanning transmission electron microscopy of core/shell nanocrystals shows clear correlations between structure and quantum efficiency. Uniform shell coverage is obtained only for a graded CdS/ZnS shell material and is found to be critical to achieving near 100% quantum yield. The sublattice sensitivity of the images confirms that preferential growth takes place on the anion-terminated surfaces. This explains the three-dimensional “nanobullet” shape observed in the case of core/shell nanorods.Keywords
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