Literature DB >> 16834437

Structural basis for near unity quantum yield core/shell nanostructures.

James McBride1, Joe Treadway, L C Feldman, Stephen J Pennycook, Sandra J Rosenthal.   

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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Year:  2006        PMID： 16834437     DOI： 10.1021/nl060993k

Source DB:  PubMed          Journal:  Nano Lett        ISSN： 1530-6984            Impact factor:   11.189


  26 in total

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