Coalescence and interface diffusion in linear CdTe/CdSe/CdTe heterojunction nanorods

被引：48

作者：

Koo, Bonil

Korgel, Brian A. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Chem Engn, Ctr Nano & Mol Sci & Technol, Austin, TX 78712 USA

来源：

NANO LETTERS | 2008年 / 8卷 / 08期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1021/nl8015126

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Colloidal nanorods with linear CdTe/CdSe/CdTe heterojunctions were synthesized by sequential reactant injection. After CdTe deposition at the ends of initially formed CdSe nanorods, continued heating in solution leads to Se-Te interdiffusion across the heterojunctions and coalescence to decreased aspect ratio. The Se-Te interdiffusion rates were measured by mapping the composition profile using nanobeam energy dispersive X-ray spectroscopy (EDS) along the lengths of individual nanorods aged in hot solvent for different amounts of time. The rate of nanorod coalescence was also measured and compared to model predictions using a continuum viscous flow model, which appears to provide a reasonable estimate of the coalescence rate.

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收藏

页码：2490 / 2496

页数：7

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