Reversed-Phase HPLC Separation of Water-Soluble, Monolayer-Protected Quantum Dots

被引：12
|
作者：
Owens, Stephanie A. [1 ]
Carpenter, Margaret C. [1 ]
Sonne, James W. H. [1 ]
Miller, Corwin A. [1 ]
Renehan, Jack R. [1 ]
Odonkor, Charles A. [1 ]
Henry, Elizabeth M. [1 ]
Miles, Deon T. [1 ]
机构：
[1] Sewanee Univ S, Dept Chem, Sewanee, TN 37383 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 39期
关键词：
CAPPED CDTE NANOCRYSTALS; PHOTOLUMINESCENCE; CDSE; ACID; SIZE; CHROMATOGRAPHY; MICELLES; LIGAND; CELLS;
D O I：
10.1021/jp201554d
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The synthesis and characterization of water-soluble, monolayer-protected CdSe and ZnSe quantum dots (QDs) is described. The QDs were prepared using various water-soluble thiol ligands in different metal-to-thiol ratios. This work presents use of reversed-phase, high-performance liquid chromatography (RP-HPLC) to separate QDs of different sizes. Polydisperse QD samples were separated into monodisperse fractions using RP-HPLC, with resulting fwhm values <12 nm. The separation is based on the polarity of the surrounding thiol as well as the size of the nanopartide. In addition, the pH behavior of the water-soluble QDs was studied. The QDs appear to be most stable in basic solutions and are best preserved over long periods of time when dried.
引用
收藏
页码：18952 / 18957
页数：6
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