Characterization of nanocrystalline CdSe by size exclusion chromatography

被引：103

作者：

Krueger, KM ^{[1
]}

Al-Somali, AM ^{[1
]}

Falkner, JC ^{[1
]}

Colvin, VL ^{[1
]}

机构：

[1] Rice Univ, Dept Chem, Houston, TX 77005 USA

来源：

ANALYTICAL CHEMISTRY | 2005年 / 77卷 / 11期

关键词：

D O I：

10.1021/ac0481912

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

High-performance size exclusion chromatography (HPSEC) is a powerful tool for probing the size and size distribution of complex materials. Here we report its application to the analysis of cadmium selenide nanocrystals produced in organic solvents. If nanocrystal-column interactions are minimized, this method provides an accurate measure of nanocrystal hydrodynamic diameter directly in solution; such information is complementary to TEM in that it can measure the thickness of various capping agents. While the resolution of single-pass HPSEC is limited to 1 nm, we show here that recycling size exclusion chromatography can be applied to assess the fine details of a sample's distribution. Finally, semiconductor nanocrystals can be made a variety of shapes whose optical characteristics are difficult to distinguish. HPSEC can be applied to the general problem of shape separations which we demonstrate with a tetrapod material.

引用

页码：3511 / 3515

页数：5

共 36 条

[1] Recycling size exclusion chromatography for the analysis and separation of nanocrystalline gold [J].