Three-Dimensional Atomic Imaging of Colloidal Core-Shell Nanocrystals

被引：121

作者：

Bals, Sara ^{[1
]}

Casavola, Marianna ^{[2
]}

van Huis, Marijn A. ^{[1
,3
]}

Van Aert, Sandra ^{[1
]}

Batenburg, K. Joost ^{[4
,5
]}

Van Tendeloo, Gustaaf ^{[1
]}

Vanmaekelbergh, Daniel ^{[2
]}

机构：

[1] Univ Antwerp, EMAT, B-2020 Antwerp, Belgium

[2] Univ Utrecht, Debye Inst Nanomat Sci, NL-3508 TA Utrecht, Netherlands

[3] Delft Univ Technol, Kavli Inst Nanosci, NL-2628 CJ Delft, Netherlands

[4] Univ Antwerp, Vis Lab, B-2610 Antwerp, Belgium

[5] Ctr Wiskunde & Informat, NL-1098 XG Amsterdam, Netherlands

来源：

NANO LETTERS | 2011年 / 11卷 / 08期

基金：

欧盟第七框架计划;

关键词：

Electron tomography; semiconductor nanocrystals; core-shell particles; cation exchange; CDSE/CDS CORE/SHELL NANOCRYSTALS; TOTAL-ENERGY CALCULATIONS; WAVE BASIS-SET; QUANTUM DOTS; SEMICONDUCTOR NANOCRYSTALS; DISCRETE TOMOGRAPHY; EPITAXIAL-GROWTH; OPTICAL GAIN; EMISSION; RECONSTRUCTION;

D O I：

10.1021/nl201826e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 freestanding 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.

引用

页码：3420 / 3424

页数：5

共 34 条

[1] Photocatalytic Hydrogen Production with Tunable Nanorod Heterostructures [J].