Determination of nanocrystal sizes:: A comparison of TEM, SAXS, and XRD studies of highly monodisperse COPt3 particles

被引:631
作者
Borchert, H
Shevehenko, EV
Robert, A
Mekis, I
Kornowski, A
Grübel, G
Weller, H
机构
[1] Inst Chem Phys, D-20146 Hamburg, Germany
[2] ESRF, F-38043 Grenoble, France
[3] HASYLAB, D-22063 Hamburg, Germany
[4] DESY, D-22063 Hamburg, Germany
关键词
D O I
10.1021/la0477183
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
One of the most fundamental tasks in nanoscience is the accurate determination of particle sizes. Various methods have been developed to elucidate the mean particle diameter and the standard deviation for an ensemble of nanocrystals. However, good agreement between the results from different methods is not always encountered in the literature. In this study, we investigate colloidally prepared, highly monodisperse CoPt3 nanoparticles by transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), and powder X-ray diffraction (XRD). The results are compared in order to examine to which extent agreement is obtained by the different techniques when applied to small nanocrystals in the size range below 10 run. In particular, the applicability of the simple Scherrer formula for size determination from the broadening of XRD reflections is checked. When the different techniques are correctly applied, the results from all methods are in good agreement.
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收藏
页码:1931 / 1936
页数:6
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