XANES: observation of quantum confinement in the conduction band of colloidal PbS quantum dots

被引：6
|
作者：
Demchenko, I. N. [1 ]
Chernyshova, M.
He, X.
Minikayev, R. [1 ]
Syryanyy, Y. [1 ]
Derkachova, A. [1 ]
Derkachov, G. [1 ]
Stolte, W. C.
Piskorska-Hommel, E.
Reszka, A. [1 ]
Liang, H.
机构：
[1] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
来源：
15TH INTERNATIONAL CONFERENCE ON X-RAY ABSORPTION FINE STRUCTURE (XAFS15) | 2013年 / 430卷
关键词：
SELF-ABSORPTION; EDGE;
D O I：
10.1088/1742-6596/430/1/012030
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The presented investigations aimed at development of inexpensive method for synthesized materials suitable for utilization of solar energy. This important issue was addressed by focusing, mainly, on electronic local structure studies with supporting x-ray diffraction (XRD) and transmission electron microscopy (TEM) analysis of colloidal galena nano-particles (NPs) and quantum dots (QDs) synthesized using wet chemistry under microwave irradiation. Performed x-ray absorption near edge structure (XANES) analysis revealed an evidence of quantum confinement for the sample with QDs, where the bottom of the conduction band was shifted to higher energy. The QDs were found to be passivated with oxides at the surface. Existence of sulfate/sulfite and thiosulfate species in pure PbS and QDs, respectively, was identified.
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页数：5
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