A highly efficient capillary electrophoresis-based method for size determination of water-soluble CdSe/ZnS core-shell quantum dots
文献类型: 外文期刊
第一作者: Li, Yong-Qiang
作者: Li, Yong-Qiang;Wang, Hai-Qiao;Wang, Jian-Hao;Guan, Li-Yun;Liu, Bi-Feng;Zhao, Yuan-Di;Chen, Hong
作者机构:
关键词: Capillary electrophoresis;Polymeric additive;Quantum dots;Sieving medium;Size determination;Size separation
期刊名称:ANALYTICA CHIMICA ACTA ( 影响因子:6.558; 五年影响因子:6.228 )
ISSN: 0003-2670
年卷期: 2009 年 647 卷 2 期
页码:
收录情况: SCI
摘要: This paper describes a highly efficient method for size determination of water-soluble CdSe/ZnS core-shell quantum dots (QDs) by capillary electrophoresis (CE) using polymer additive as sieving medium. The influence of some factors, such as kinds and concentrations of the sieving medium, pH, concentrations of the background electrolyte (BGE) and applied voltage, on the separation of QDs was investigated. Under the optimal separation conditions, four different sized QDs were successfully separated, and the relative standard deviation (RSD) of the migration times for these QDs was below 1.013%. In addition, an equation was fit by taking into account the correlation existing between the electrophoretic mobilities and the sizes of a set of QDs. The feasibility of this equation to measure the sizes of other QDs was confirmed by comparison with the sizes obtained by transmission electron microscopy (TEM) experiment. This work offers a novel method for size determination of QDs, and provides an important reference on the study of QDs based on CE. (C) 2009 Elsevier B.V. All rights reserved.
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