Three-Dimensional Atomic Imaging of Colloidal Core–Shell Nanocrystals

Colloidal core–shell semiconductor nanocrystals form an important class of optoelectronic materials, in which the exciton wave functions can be tailored by the atomic configuration of the core, the interfacial layers, and the shell. Here, we provide a trustful 3D characterization at the atomic scale...

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Vydané v:Nano letters Ročník 11; číslo 8; s. 3420 - 3424
Hlavní autori: Bals, Sara, Casavola, Marianna, van Huis, Marijn A, Van Aert, Sandra, Batenburg, K. Joost, Van Tendeloo, Gustaaf, Vanmaekelbergh, Daniël
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Washington, DC American Chemical Society 10.08.2011
Predmet:
Cation exchanging
Colloids
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron states
Exact sciences and technology
Exchange
Excitons and related phenomena
Nanocrystals
Optoelectronics
Physics
Semiconductors
Three dimensional
Tomography
Wave functions
Electron tomography
core−shell particles
semiconductor nanocrystals
cation exchange
Optoelectronics
Excitons
Semiconductor materials
Lead selenides
Core shell structure
Imaging
Colloidal crystals
Wave functions
Ion exchange
Electron microscopy
Cadmium selenides
ISSN:1530-6984, 1530-6992, 1530-6992
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Popis
Shrnutí:Colloidal core–shell semiconductor nanocrystals form an important class of optoelectronic materials, in which the exciton wave functions can be tailored by the atomic configuration of the core, the interfacial layers, and the shell. Here, we provide a trustful 3D characterization at the atomic scale of a free-standing PbSe(core)–CdSe(shell) nanocrystal by combining electron microscopy and discrete tomography. Our results yield unique insights for understanding the process of cation exchange, which is widely employed in the synthesis of core–shell nanocrystals. The study that we present is generally applicable to the broad range of colloidal heteronanocrystals that currently emerge as a new class of materials with technological importance.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1530-6984
1530-6992
1530-6992
DOI:10.1021/nl201826e