Structural basis for near unity quantum yield core/shell nanostructures

James Mcbride; Joe Treadway; L. C. Feldman; Stephen J. Pennycook; Sandra J. Rosenthal

doi:10.1021/nl060993k

Structural basis for near unity quantum yield core/shell nanostructures

James Mcbride, Joe Treadway, L. C. Feldman, Stephen J. Pennycook, Sandra J. Rosenthal

Rutgers University

Research output: Contribution to journal › Article › peer-review

179 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1496-1501
Number of pages	6
Journal	Nano letters
Volume	6
Issue number	7
DOIs	https://doi.org/10.1021/nl060993k
Publication status	Published - Jul 1 2006

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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AU - Mcbride, James

AU - Treadway, Joe

AU - Feldman, L. C.

AU - Pennycook, Stephen J.

AU - Rosenthal, Sandra J.

PY - 2006/7/1

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AB - 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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Structural basis for near unity quantum yield core/shell nanostructures

Abstract

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