Quantitative Structural Analysis of Binary Nanocrystal Superlattices by Electron Tomography

[en] Binary nanocrystal superlattices, that is, ordered structures of two sorts of nanocolloids, hold promise for a series of functional materials with novel collective properties. Here we show that based on electron tomography a comprehensive, quantitative, three-dimensional characterization of these systems down to the single nanocrystal level can be achieved, which is key in understanding the emerging materials properties. On four binary lattices composed of PbSe, CdSe, and Au nanocrystals, we illustrate that ambiguous interpretations based on two-dimensional transmission electron microscopy can be prevented, nanocrystal sizes and superlattice parameters accurately determined, individual crystallographic point and plane defects studied, and the order/disorder at the top and bottom surfaces imaged. Furthermore, our results suggest that superlattice nucleation and growth occurred at the suspension/air interface and that the unit cells of some lattices are anisotropically deformed upon drying.

Disciplines :

Materials science & engineering
Chemistry

Author, co-author :

Friedrich, Heiner

Gommes, Cédric ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique

Overgaag, Karin

Meeldijk, Johannes

Evers, Wiel

de Nijs, Bart

Boneschanscher, Mark

de Jongh, Petra

Verkleij, Arie

de Jong, Krijn

Van Blaaderen, Alfons

Vanmaekelbergh, Daniel

Language :

English

Title :

Quantitative Structural Analysis of Binary Nanocrystal Superlattices by Electron Tomography

Publication date :

2009

Journal title :

Nano Letters

ISSN :

1530-6984

eISSN :

1530-6992

Publisher :

American Chemical Society, Washington, United States - District of Columbia

Volume :

Pages :

2719–2724

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]

Available on ORBi :

since 26 November 2009

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