Thermal behaviour of CdS nanoparticles investigated by high resolution photoelectron spectroscopy

Authors
Winkler, U Eich, D Chen, ZH Fink, R Kulkarni, SK Umbach, E
Citation
U. Winkler et al., Thermal behaviour of CdS nanoparticles investigated by high resolution photoelectron spectroscopy, PHYS ST S-A, 173(1), 1999, pp. 253-259
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH
ISSN journal
00318965 → ACNP
Volume
173
Issue
1
Year of publication
1999
Pages
253 - 259
Database
ISI
SICI code
0031-8965(19990516)173:1<253:TBOCNI>2.0.ZU;2-R
Abstract
The thermal behaviour of CdS nanoparticles and especially of their surfaces has been investigated by high resolution photoelectron spectroscopy. Diffe rent annealing characteristics were observed for particles of different siz es. From the changes of surface core-level shifts in the S 2p and Cd 3d(5/2 ) spectra we derive that the nanoparticle surface, which is S-terminated at room temperature, changes after annealing by removal of S atoms and segreg ation of Cd atoms. Furthermore, we observe that the temperature at which th is process takes place depends on the particle size.