Shape separation of nanometer cold particles by size-exclusion chromotography

被引:157
作者
Wei, GT [1 ]
Liu, FK [1 ]
Wang, CRC [1 ]
机构
[1] Natl Chung Cheng Univ, Dept Chem, Chiayi, Taiwan
关键词
D O I
10.1021/ac990044u
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The shape separations of suspended gold nanoparticles were investigated using size-exclusion chromatography. The separations in shapes were identified by examining the 3-D chromatograms obtained by employing a diode; away detection system and were further confirmed by analyzing TEM images of fractional collection of particles; This shape separation was achieved by adding a mixed-surfactant system containing sodium dodecyl sulfate and poluoxyethylene (23) dodecanol (Brij-35) into the eluent; which apparently affects the adsorption behaviors of both rodlike and spherical Au nanoparticles onto the column packing materials. While the overall particle gross sizes of these two shapes were similar, the baseline resolution was unfortunately not obtainable. However, the absorption spectra from the diode-array detector could be utilized td interpret the shapes of Au nanoparticles. The potential capability for the size separation of Au nanoparticles by size-exclusion chromatography with diode-away detection was also demonstrated.
引用
收藏
页码:2085 / 2091
页数:7
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