High resolution photoemission study of CdSe and CdSe/ZnS core-shell nanocrystals

被引：64
作者：
Borchert, H
Talapin, DV
McGinley, C
Adam, S
Lobo, A
de Castro, ARB
Möller, T
Weller, H
机构：
[1] Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany
[2] DESY, HASYLAB, D-22603 Hamburg, Germany
[3] Lab Nacl Luz Sincrotron, BR-13084971 Campinas, SP, Brazil
[4] UNICAMP, IFGW, BR-13083970 Campinas, SP, Brazil
来源：
JOURNAL OF CHEMICAL PHYSICS | 2003年 / 119卷 / 03期
关键词：
D O I：
10.1063/1.1580096
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：
Colloidally prepared CdSe and CdSe/ZnS core-shell nanocrystals passivated with trioctylphosphine/trioctylphosphine oxide and hexadecylamine have been studied by photoelectron spectroscopy with tuneable synchrotron radiation. High-resolution spectra of the Se 3d level in CdSe nanocrystals indicate the bonding of organic ligands not only to surface Cd but also to surface Se atoms. The investigation of the CdSe/ZnS core-shell nanocrystals allows us to determine the average thickness of the ZnS shell and to study the interface between the two semiconductor nanomaterials. The photoemission spectra indicate a rather well ordered interface. No evidence for interfacial bonds other than Cd-S and Se-Zn is found. (C) 2003 American Institute of Physics.
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页码：1800 / 1807
页数：8
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