Alkyl Chains of Surface Ligands Affect Polytypism of CdSe Nanocrystals and Play an Important Role in the Synthesis of Anisotropic Nanoheterostructures

被引：109

作者：

Huang, Jing ^{[1
]}

Kovalenko, Maksym V. ^{[1
]}

Talapin, Dmitri V. ^{[1
,2
]}

机构：

[1] Univ Chicago, Dept Chem, Chicago, IL 60637 USA

[2] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2010年 / 132卷 / 45期

基金：

美国国家科学基金会;

关键词：

SELF-ASSEMBLED MONOLAYERS; SEEDED-GROWTH; QUANTUM DOTS; NANOPARTICLES; NANORODS; SHAPE; SEMICONDUCTORS; MONODISPERSE; NANOWIRES; BINDING;

D O I：

10.1021/ja105132u

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We show that the length of the alkyl chain of surface ligands can shift the equilibrium between the wurtzite and zinc blende polytypes of CdSe nanocrystals. In-situ wide-angle X-ray scattering measurements reveal that short-chain (e.g., propyl) phosphonic acids stabilize CdSe nanocrystals with the zinc blende phase whereas octadecylphosphonic acid stabilize nanocrystals with the wurtzite phase. We also demonstrate how this effect can be used to improve the shape selectivity in the synthesis of anisotropic CdSe/CdS and ZnSe/CdS nanoheterostructures.

引用

页码：15866 / 15868

页数：3

共 6 条

[1] Tight-binding studies of surface effects on electronic structure of CdSe nanocrystals: the role of organic ligands, surface reconstruction, and inorganic capping shells
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[6] The Surface Layer Homology Domain-Containing Proteins of Alkaliphilic Bacillus pseudofirmus OF4 Play an Important Role in Alkaline Adaptation via Peptidoglycan Synthesis
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