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. 2006 Jul;6(7):1496-501.
doi: 10.1021/nl060993k.

Structural basis for near unity quantum yield core/shell nanostructures

James McBride  1 , Joe Treadway, L C Feldman, Stephen J Pennycook, Sandra J Rosenthal
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Structural basis for near unity quantum yield core/shell nanostructures

James McBride et al. Nano Lett. 2006 Jul.

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.

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